Washington Post Posted by Chris Cillizza and Aaron Blake President Obama ran — and won — in 2008 on the idea of uniting the country. But, each of his first three years in office have marked historic highs in political polarization, with Democrats… more »

CNN / Peter Hamby Greenville, South Carolina (CNN) -- For most of 2011, South Carolina was the forgotten stepchild of the Republican race. As former Republican Gov. Mark Sanford put it, "Just a few weeks ago, most people I talked to wouldn't know… more »

Foxnews The average American could buy a house for the amount of money it takes to run Air Force One every hour.  The U.S. military has provided an updated estimate on that cost, first published by a taxpayer watchdog group and confirmed by FoxNews.c… more »

 July 30: Gov. Jan Brewer, accompanied by Sen. John McCain pauses before answering a question regarding the latest on the new Arizona immigration law.Associated PressSAN FRANCISCO -- A federal appeals court says it will hold a hearing in Novemb… more »

AP GENEVA – The world's largest atom smasher conducted its first experiments at conditions nearing those after the Big Bang, breaking its own record for high-energy collisions with proton beams crashing into each other Tuesday at three times more force… more »