Clearly, the bloom is off the rose.

Americans are divided over whether President Barack Obama or his predecessor has performed better in the White House, according to a new national poll.

And a CNN/Opinion Research Corporation survey released Friday also indicates in the battle for Congress, Republicans hold large advantages over the Democrats among independents, men and blue-collar whites. The poll also indicates that Republicans are much more enthusiastic than Democrats to vote.

By 47 to 45 percent, Americans say Obama is a better president than George W. Bush. But that two point margin is down from a 23 point advantage one year ago.

“Democrats may want to think twice about bringing up former President George W. Bush’s name while campaigning this year,” says CNN Polling Director Keating Holland.

But, there is some good news for Democrats.

“There are plenty of people who support the Democratic candidate, but many of them are probably not going to actually cast a ballot. In fact, if you look at “unlikely voters” – people who are registered to vote but unlikely to cast a ballot – the Democrats have a six-point edge on the generic ballot question.”

I didn’t say it was really good news…