A new poll shows President Obama would lose to Mitt Romney if another election were held today. In the CNN/ORC International poll, 53% said they would support Romney in a 2012 election rematch, compared to 44% support for Obama.

Romney has said he will not run again in 2016, and in a hypothetical matchup with Hillary Clinton, respondents favored the former First Lady by a margin of 55-42%.

Meantime, with 100 days to go until the midterm elections, the New York Times pegs the chances of Republicans retaking control of the Senate at 60%. The GOP needs to pick up six seats to win control of the Senate.

On America's Newsroom this morning, Martha MacCallum took a look at some of the key races and the new poll with political experts Joe Trippi and Ed Rollins.

Rollins said after watching elections for 50 years, he sees the trends favoring Republicans right now. He explained that the GOP candidates are looking much stronger than expected, particularly in the Senate races in Iowa and Arkansas.

Trippi agreed that if you go through the races one by one, he believes Republicans will pick up at least four seats, and said a total of 10 are "in play."

He pointed out that on the other side, Democrats believe Michelle Nunn can mount a strong challenge in Georgia.

Rollins said President Obama's unpopularity is a "drag" on Democrats right now, adding that he believes people are starting to realize Obama's leadership "shortcomings" compared to Romney.

The former Reagan-Bush '84 campaign manager still believes another Romney White House run is possible.

"At the end of the day, Romney may be encouraged to take another shot at this thing. I'm hearing more and more rumblings. The one thing that he does have that's an advantage is that he can raise a tremendous sum of money, and, obviously, you run a much better campaign the second time than you did the first time," said Rollins.

Trippi, however, said he would caution Republicans against nominating Romney again.

Watch the discussion above, and see more analysis from Special Report host Bret Baier below.