Here is Romney lying about defense spending and falsely claiming Obama has made "huge" cuts in the defense budget: http://romneytheliar.blogspot.com/2012/01/romney-lies-about-his-own-first-name.html
Here is Romney's staff gloating about his TV ad lying about Obama and the economy: http://romneytheliar.blogspot.com/2012/01/romney-liar-lying-and-proud-of-it.html
Here is Romney's outrageous lie that Obama has increased the national debt more than all other presidents combined: http://romneytheliar.blogspot.com/2012/01/romney-lies-about-obamas-contribution.html
Here is Romney's lie about his plans to give huge tax cuts to people like himself:
http://romneytheliar.blogspot.com/2012/01/romney-lies-about-not-giving-rich-new.html
Here is Romney's infuriating lie about President Obama's so-called "Apology Tour": http://romneytheliar.blogspot.com/2012/01/romney-lies-about-president-obamas-so.html
Here is Romney's lie about his father and Martin Luther King: http://romneytheliar.blogspot.com/2012/01/romney-has-been-lying-for-years-about.html
Here is Romney's astonishing, brazen lie that President Obama is responsible for ALL the job losses in the recession: http://romneytheliar.blogspot.com/2012/01/romney-liar-blames-obama-for-all-jobs.html
Here is Romney caught lying by Rachel Maddow about his "Obama made the recession worse" remarks: http://romneytheliar.blogspot.com/2012/01/romney-liar-caught-lying-about-his-own.html
Here is Romney lying about the activities of his SuperPac in Iowa: http://romneytheliar.blogspot.com/2012/01/romney-liar-lies-about-his-own-super.html
Here is Romney's shockingly brazen lie that President Obama's objective is "equal outcomes" for all people: http://romneytheliar.blogspot.com/2012/01/romney-liar-claims-that-obamas.html
Here's Romney in full, lying sociopath mode after his win in New Hampshire:
http://romneytheliar.blogspot.com/2012/01/romney-liar-in-full-bullsht-mode-in-nh.html
Here is Romney lying about his record on gay rights: http://romneytheliar.blogspot.com/2012/01/romney-liar-lies-about-his-support-for.html
Here is Romney lying about the President's healthcare law: http://romneytheliar.blogspot.com/2012/01/romney-liar-lies-about-president-obamas.html
Here is Romney's lie about the President's so-called policy of "appeasement": http://romneytheliar.blogspot.com/2012/01/romney-lying-con-artist-pushing-obama.html
Here is how Romney's lies fit into a general pattern of sociopathy: http://romneytheliar.blogspot.com/2012/01/why-does-romney-lie-about-everything.html
Here is Romney lying right to David Corn's face about something Romney said that Corn heard PERSONALLY: http://romneytheliar.blogspot.com/2012/01/romney-liar-again-tells-unbelievably.html
Here is Romney lying about President Obama's trade policies: http://romneytheliar.blogspot.com/2012/01/romney-liar-is-lying-constantly-about.html
Here is Romney lying about the "savings" that would come from repealing the healthcare law: http://romneytheliar.blogspot.com/2012/01/romney-liar-lying-about-savings.html
Here is a CONSERVATIVE commentator talking about the tissue of pathetic lies that is Mitt Romney's stump speech: http://romneytheliar.blogspot.com/2012/01/romneys-stump-speech-wall-to-wall-lies.html
Here is Romney AGAIN lying about Obama's defense policy: http://romneytheliar.blogspot.com/2012/01/romney-liar-lying-through-his-teeth.html
Here is Romney lying about his "regular guy" status, including his AMAZING lie that he has feared getting a "pink slip" notice himself: http://romneytheliar.blogspot.com/2012/01/romney-liar-laughably-pathetically.html
Here is Romney claiming that anyone who questions his business tactics is "attacking the free enterprise system": http://romneytheliar.blogspot.com/2012/01/romney-liar-claims-anyone-who-questions.html
Here is Jon Stewart nailing Romney's lies and deceptions about the tax code: http://romneytheliar.blogspot.com/2012/01/romney-liar-benefits-from-tax-code-his.html
Here is Romney's lie about President Obama having "raised" the corporate tax rate:http://romneytheliar.blogspot.com/2012/01/romney-liar-falsely-claims-obama.html
Here is Romney claiming he pays a 50%(!!) tax rate: http://romneytheliar.blogspot.com/2012/01/romney-liar-claims-he-pays-50-tax-rate.html
Here is Romney's lie about President Obama and rocket attacks against Israel: http://romneytheliar.blogspot.com/2012/01/romney-liar-lies-again-and-again-about.html
Here are Romney's lies about his "job creator" record: http://romneytheliar.blogspot.com/2012/01/debunking-romney-liars-job-creator-lies.html
Here is Romney's BLATANT lie that Gingrich "outspent him" in South Carolina: http://romneytheliar.blogspot.com/2012/01/romney-liar-claims-that-he-was-outspent.html
Here is Romney's lie about President Obama's record on regulations, a lie of ASTONISHING magnitude: http://romneytheliar.blogspot.com/2012/02/romney-liar-continues-to-lie-about-our.html
Here is Romney lying about social programs that aid the poor: http://romneytheliar.blogspot.com/2012/02/romney-liar-lies-about-aid-to-poor.html
Here is Romney lying about his "blind trust": http://romneytheliar.blogspot.com/2012/02/romney-liar-is-lying-about-his-blind.html
Here is Romney attempting to take credit for an auto bailout he OPPOSED: http://romneytheliar.blogspot.com/2012/02/romney-liar-is-trying-to-take-credit.html
Here is Romney lying about his intentions for Social Security and Medicare: http://romneytheliar.blogspot.com/2012/02/romney-liar-pledges-to-save-programs-he.html
Here's Romney lying about the birth control ruling: http://romneytheliar.blogspot.com/2012/02/romney-liar-lying-about-birth-control.html
Here's an item about the vicious, lying, right-wing hitman that Romney has hired to spread lies about Willard's opponents: http://romneytheliar.blogspot.com/2012/02/romney-liar-using-gutter-level-right.html
Here's Romney CONTINUING to tell the lie that "Obama made the recession worse": http://romneytheliar.blogspot.com/2012/02/romney-liar-continues-to-tell-obama.html
Here's Romney calling himself "moderate" and "progressive" in 2002:
http://romneytheliar.blogspot.com/2012/02/sometimes-romneys-lies-are-just.html
Here's Romney lying about his position on climate change: http://romneytheliar.blogspot.com/2012/02/romney-liar-does-old-switcheroo-on.html
Here's Romney lying about his "Mexican" background and his jobs record: http://romneytheliar.blogspot.com/2012/02/romney-liar-does-old-switcheroo-on.html
Here's Romney lying about Medicare: http://romneytheliar.blogspot.com/2012/02/romney-liar-continues-his-brazen.html
Here's Romney trying to rewrite the history of the auto bailout AGAIN: http://romneytheliar.blogspot.com/2012/02/romney-liar-tries-to-rewrite-history-on.html
Here's Romney lying about defense policy in general and the Navy in particular:
http://romneytheliar.blogspot.com/2012/02/romney-liar-continues-to-lie-about.html
Here is Romney's lying claim that he has never changed his position on immigration:http://romneytheliar.blogspot.com/2012/02/romney-liar-attacked-gingrich-for-same.html
Here is Romney's incredibly vicious lie that President Obama has "fought against religion": http://romneytheliar.blogspot.com/2012/02/romney-liar-utters-what-is-perhaps-his.html
Here is Romney lying about sanctions on Iran: http://romneytheliar.blogspot.com/2012/02/romney-liar-lies-about-sanctions-on.html
Here is Romney's fictional account of his time as governor of Massachusetts: http://romneytheliar.blogspot.com/2012/02/romney-liars-account-of-his-time-in.html
Here are Romney's INCREDIBLE lies about his record on abortion rights: http://romneytheliar.blogspot.com/2012/02/romney-liar-says-he-was-never-pro.html
Here's Romney lying about his own "memories": http://romneytheliar.blogspot.com/2012/02/romney-liar-lies-about-everything-even.html
Here's Romney caught lying, on videotape: http://romneytheliar.blogspot.com/2012/03/romney-liar-caught-on-tape-in-another.html
Here's Romney's lie about President Obama being a "crony capitalist": http://romneytheliar.blogspot.com/2012/03/romney-liar-calls-obama-crony.html
Here's Romney lying about Obama and Iran--AGAIN: http://romneytheliar.blogspot.com/2012/03/romney-liar-lies-regularly-about-obama.html
Here's Romney's utterly dishonest taxation and budgetary proposals: http://romneytheliar.blogspot.com/2012/03/romney-liar-proposing-utterly-dishonest.html
Here's Romney lying about Obama and Medicare AGAIN: http://romneytheliar.blogspot.com/2012/03/is-there-any-limit-to-mitt-romneys.html
Here's Romney lying about the minimum wage: http://romneytheliar.blogspot.com/2012/03/blog-post.html
Here's Romney's absurd lie that President Obama "wants" higher gas prices:
http://romneytheliar.blogspot.com/2012/03/romney-liar-claims-that-obama-wanted.html
Here's Romney's Etch-a-Sketch moment: http://romneytheliar.blogspot.com/2012/03/romney-liar-etch-sketch-candidate.html
Here's Rachel Maddow's epic takedown of Romney the Liar: http://romneytheliar.blogspot.com/2012/03/straight-talk-about-crooked-romney.html
Here's Romney the Liar trying to be evasive about his tax and budget plans: http://romneytheliar.blogspot.com/2012/03/you-gotta-hand-it-to-mittens.html
Here's Romney's attempt to bury his contribution to an anti-gay hate group: http://romneytheliar.blogspot.com/2012/03/romney-liar-tried-to-hide-contribution.html
Here's Team Obama holding Romney accountable for his lies: http://romneytheliar.blogspot.com/2012/04/yes-obama-team-is-calling-romney-what.html
Here's Romney being nailed for his incessant flip-flops: http://romneytheliar.blogspot.com/2012/04/romney-liar-nailed-on-his-unrelenting.html
Here's Romney lying about Medicare AGAIN: http://romneytheliar.blogspot.com/2012/04/romney-liar-thinks-he-can-get-away-with.html
Here's Romney being caught lying on tape (again): http://romneytheliar.blogspot.com/2012/04/romney-liar-nailedagain.html
Here's Romney being skewered by SNL: http://romneytheliar.blogspot.com/2012/04/romney-liar-skewered-perfectly-on-snl.html
Here's Romney's lie about Obama and Harvard: http://romneytheliar.blogspot.com/2012/04/sometimes-romney-liar-is-just-pathetic.html
Here's Romney lying about unemployment among women: http://romneytheliar.blogspot.com/2012/04/romney-liar-claims-obama-is-responsible.html
Here is Romney being ridiculed in a very catchy song: http://romneytheliar.blogspot.com/2012/04/romney-liarin-song.html
Here is Romney lying about Obama's record on guns:
http://romneytheliar.blogspot.com/2012/04/romney-liar-sucking-up-to-nra-lunacy.html
Here's Romney on video, spewing one lie after another:
http://romneytheliar.blogspot.com/2012/04/once-again-romney-liar-on-video-doing.html
Here's an account of just how many lies Willard can pack into a single speech:
http://romneytheliar.blogspot.com/2012/04/willard-true-stream-of-consciousness.html
Here's a trio of Willard lies, one about Obama, one about his family, and one about his own freaking life:
http://romneytheliar.blogspot.com/2012/04/trio-of-lies-from-romney-liar.html
Here's Romney lying (AGAIN!) about the healthcare law, an item based on Jed Lewison's reporting on DKos:
http://romneytheliar.blogspot.com/2012/04/romney-liars-outrageous-lie-about.html
Here's Romney being caught in a series of lies about foreign policy:
http://romneytheliar.blogspot.com/2012/04/romney-liar-foreign-policy-edition.html
Here's Willard's INCREDIBLE lie that Bush had nothing to do with the economic meltdown:
http://romneytheliar.blogspot.com/2012/04/romney-liar-claims-that-bush-had.html
Here's Romney's campaign AGAIN trying to take credit for an auto company bailout that Romney opposed:
http://romneytheliar.blogspot.com/2012/04/romney-liars-campaign-again-taking.html
Here's Romney lying about his intentions to take out bin Laden:
http://romneytheliar.blogspot.com/2012/05/no-romney-liar-would-not-have-gone.html
Here's the Romney campaign's absurd claim that Al Qaeda has grown stronger in the wake of bin Laden's death:
http://romneytheliar.blogspot.com/2012/05/no-romney-liar-would-not-have-gone.html
Here's Gingrich telling the truth for once: that Romney is a liar:
http://romneytheliar.blogspot.com/2012/05/at-least-newt-is-right-about-one-thing.html
Here's Steve Benen's OUTSTANDING work in exposing Romney's lies, with five examples:
http://romneytheliar.blogspot.com/2012/05/steve-benen-chronicles-lies-of-romney.html
And here's Robert Reich explaining why Romney's so-called "business expertise" is just another pathetic lie:
http://romneytheliar.blogspot.com/2012/05/romney-liars-so-called-business.html
(And don't miss the excellent diary by plf515 called "All Mitt's Flips". It's right here)
I simply have gathered Romney's lies together, for the most part. (Sometimes I find news items myself and highlight them.) Steve Benen, Andrew Sullivan, a lot of you good folks here on DKos (especially Jed), the good folks at Balloon Juice, and many others have rooted them out. I wanted to give you a ready resource for making these things go viral, as widely as possible.
I hope this helps.