Santorum flips on Dems voting in GOP primaries  —  Washington (CNN) - As voters headed to the polls in Michigan on Tuesday, Rick Santorum defended a robo call his campaign used in the state urging Democrats to support its candidate as a vote against Mitt Romney.

Santorum regrets ‘throw up’ response to Kennedy speech  —  Rick Santorum regrets saying that he wanted to “throw up” in response to watching a video clip of President John F. Kennedy's 1960 speech about the separation of church and state.  —  “I wish I had that particular line back,” …

The Possum Republicans  —  Politicians do what they must to get re-elected.  So it's not unexpected that Republican senators like Richard Lugar and Orrin Hatch would swing sharply to the right to fend off primary challengers.  —  As Jonathan Weisman reported in The Times on Sunday …

John McCain: Close curtain on GOP ‘Greek tragedy’  —  Believes ‘negative’ campaign will take a toll in November  —  Former GOP presidential candidate John McCain said yesterday he fears Republicans will be stuck with a bloodied nominee so sapped by months of campaign attacks …

Mitt Romney Wins Primaries in Michigan and Arizona  —  Mitt Romney pulled off a win in the Michigan primary tonight, though the race was close and underscored his struggles as the GOP establishment candidate seeking the party's nomination.  —  The former Massachusetts governor also won …

After tough race, Romney beats Santorum in Michigan primary  —  Mitt Romney re-established himself as the Republican front-runner Tuesday night with his win in Michigan's pivotal primary, fending off what would have been a crushing defeat by rival Rick Santorum.

After Many Momentum Shifts, Michigan Is Too Close to Call  —  People sometimes apply the term “tossup” a bit too broadly, using it to refer to anything close enough that they don't want to render a prediction about it.  —  In Michigan, however, the term is appropriate.

Sen. Snowe won't seek re-election  —  Citing bitter and unbreakable partisanship in Congress, Sen. Olympia Snowe, R-Maine, announced this afternoon that she has decided not to run for re-election after 33 years in Congress.  —  In a statement issued by her campaign, Snowe said that both she and her husband …

Snowe Fall(out)  —  Speculation has already begun in the frenzy that was created after Senator Snowe announced she would not be seeking re-election to the United States Senate.  —  What caused this?  Who will run to replace her?  Can anyone do it with the March filing deadline?