Obama Approval:
50-45
...
In a hypothetical general-election contest, he leads Romney by six points, 50 to 44 percent, winning independents (46-39 percent), women (55-37 percent) and those in the Midwest (52-42 percent).
Obama enjoys bigger leads over Paul (50 to 42 percent), Santorum (53 to 39 percent) and Gingrich (54 to 37 percent).
Bolstering Obama’s standing is increased optimism about the state of the U.S. economy.
Forty percent believe the economy will improve during the next year, a three-point increase from January. And looking back at the economic recession, 57 percent say that the worst is behind us, while 36 percent say the worst is still to come.
...
And it’s been damaging for Romney, too. In January’s NBC/WSJ poll, Romney’s favorable/unfavorable rating stood at 31 percent to 36 percent among all respondents (and 22/42 percent among independents).
But in this latest survey, it’s now 28 percent favorable and 39 percent unfavorable (and 22/38 percent among independents).
In fact, Romney’s image right now is worse than almost all other recent candidates who went on to win their party’s presidential nomination: Obama’s favorable/unfavorable ratio was 51/28 percent and John McCain’s was 47/27, in the March 2008 NBC/WSJ poll; John Kerry was at 42/30 at this point in 2004; George W. Bush was 43/32 in 2000; and Bob Dole was 35/39 in March 1996.
The one exception: Bill Clinton, in April 1992, was at 32/43 percent.
http://firstread.msnbc.msn.com/_news/2012/03/04/10578249-nbcwsj-poll-primary-season-takes-corrosive-toll-on-gop-and-its-candidates