Romney Pulls Ahead In See-Saw Florida Gop Primary, Quinnipiac University Poll Finds; Men Shift From Gingrich To Romney  —  Just four days before the nation's first big-state presidential primary, former Massachusetts Gov. Mitt Romney opens up a 38 - 29 percent lead over former House Speaker …

No Need to Panic About Global Warming  —  There's no compelling scientific argument for drastic action to ‘decarbonize’ the world's economy.  —  Editor's Note: The following has been signed by the 16 scientists listed at the end of the article:  —  A candidate for public office …

Low IQ & Conservative Beliefs Linked to Prejudice  —  There's no gentle way to put it: People who give in to racism and prejudice may simply be dumb, according to a new study that is bound to stir public controversy.  —  The research finds that children with low intelligence are more likely to hold prejudiced attitudes as adults.

Ron Paul signed off on racist newsletters in the 1990s, associates say  —  Ron Paul, well known as a physician, congressman and libertarian , has also been a businessman who pursued a marketing strategy that included publishing provocative, racially charged newsletters to make money and spread his ideas …

FACT CHECK: Gingrich gives an awkward defense of a speech that was seen as attacking Spanish  —  WASHINGTON — Mitt Romney accuses Newt Gingrich of calling Spanish a “ghetto language.”  Close, but not quite.  —  Gingrich denies doing so and said he merely promoted the use of English, “period.”

Obama Ratings Historically Polarized  —  Job approval 80% among Democrats, 12% among Republicans  —  PRINCETON, NJ — The historically high gap between partisans' job approval ratings of Barack Obama continued during Obama's third year in office, with an average of 80% of Democrats and 12% …

Motive of shooter who targeted military sites is unclear  —  Yonathan Melaku was sneaking through Fort Myer and Arlington National Cemetery, his backpack filled with plastic bags of ammonium nitrate, a notebook containing jihadist messages, and a can of black spray paint.

2011 GDP: 1.7%  —  That's the final, pathetic growth number for 2011.  —  From the just-released GDP report:  —  Real GDP increased 1.7 percent in 2011 (that is, from the 2010 annual level to the 2011 annual level), compared with an increase of 3.0 percent in 2010.

Gov. Jan Brewer releases letter she handed to Obama  —  PHOENIX - In a sudden about-face, Gov. Jan Brewer on Thursday evening made public a copy of the letter she handed President Obama during their high-profile encounter a day earlier that dominated national news, the blogosphere and water-cooler conversation.

How Siri is ruining your cellphone service  —  Paul Farhi covers media for The Post.  —  Like a few million other people this past holiday season, we bought an iPhone 4S, with its much-hyped Siri feature.  The vocal interface allows users to speak all kinds of commands into the phone …

Mitt Romney's Tax Problem … This has been interpreted as a dig at Mitt Romney, whose personal wealth and comparatively low tax rate have been front-and-center in the campaign these past weeks.  Romney finally released his tax returns on Thursday, revealing a 2010 income of $27 million and a federal tax rate of 13.9%.

Twitter to censor tweets by country  —  The censorship tool is likely to raise fears that Twitter's commitment to free speech may be weakening  —  Twitter has refined its technology so it can censor messages on a country-by-country basis.  —  The additional flexibility announced on Thursday …

Romney Packed Debate Hall With Supporters, Gingrich Aide Says … 2012 Election , Barack Obama , Newt Gingrich 2012 , Republican Presidential Primary , Rick Santorum , Elections 2012 , Newt Gingrich , Video , FL Election , FL Election 2012 , FL Primary , FL Primary 2012 …

Postmodern Business Cycles  —  Noah Smith finds John Taylor claiming that the V-shaped recovery from the 1981-2 recession proves that Reagan roolz.  Kind of sad, really: I find it hard not to believe that Taylor actually knows better.  —  But anyway, this gives me an occasion to talk …