Newt Gingrich has all but erased Mitt Romney's 23-percentage-point lead of a week ago among Republican voters nationally, and the two candidates are now essentially tied, at 29% for Romney and 28% for Gingrich.

Mitt Romney leads Rick Santorum slightly, 34% to 30%, in national Republicans' preferences for their party's nomination. Romney is ahead among most subgroups; Santorum does best among conservatives and in the Midwest.

Mitt Romney is now the only candidate that a majority of conservative and moderate/liberal Republicans nationwide see as an acceptable GOP nominee for president. Conservative Republicans are more likely to say this about Romney than about either ...

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Rick Perry's Positive Intensity Score among Republicans familiar with him is down sharply to 15 from 24 two weeks ago. Herman Cain's current score of 30 is the highest Gallup has measured for any GOP presidential candidate to date, and much ...

Attorney and former Pennsylvania Sen. Rick Santorum is now suffering the fate of former college professor and Congressman Newt Gingrich -- rising to front-runner status among Republicans nationwide and then falling right back down again.

Newt Gingrich and Mitt Romney have among the highest Positive Intensity Scores from Republicans of any GOP candidate. However, Romney generates higher positive intensity from Democrats than Gingrich. Neither Republican sparks as much intensity ...

Donald Trump edges out Barack Obama as most admired man, while Michelle Obama places ahead of Kamala Harris as most admired woman.

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Both leading Republican candidates for president, Rick Santorum and Mitt Romney, are competitive against President Barack Obama when registered voters nationally are asked whom they would support in the November general election.