Frank James

If Rick Santorum has a lead on Mitt Romney in Ohio, it looks like it's not much of one. A new Quinnipiac University poll shows Santorum leading Romney by four percentage points, 35 percent to 31 percent.

With the margin of error at +/-4.3 points, the two top rivals for the Republican presidential nomination are essentially tied just days before Super Tuesday when voters in Ohio and nine other states take part in the presidential primary process.

President Obama tells both Israel and Iran through an interview with The Atlantic that "as president of the United States, I don't bluff," when he leaves open the possibility of a U.S. military strike against Iran's nuclear program.

With Republicans blaming his energy policies for higher gas prices and rising fears that U.S. gas prices could hit an average of $5 a gallon, President Obama on Thursday will renew a call Democrats make whenever oil prices rise that Congress repeal tax breaks for oil companies.

(Updated at 5:57 pm ET)

A day after Senate Democrats' chances of keeping control of the chamber seemed to improve with the news that Maine Republican Olympia Snowe was retiring from a seat Democrats seem likely to gain, they got apparently more good news — Bob Kerrey finally decided to run for the soon-to-be-vacated U.S. Senate seat from Nebraska.