Poll: Obama losing ground to GOP challengers; Update: Rasmussen disagrees in part

National Journal on ABC/Washington Post poll, via isavesmart.com:

President Obama’s approval ratings have slipped, and he no longer leads Mitt Romney in a general-election matchup, according to a new ABC News/Washington Post poll released early Monday that also shows Americans are split on whether the U.S. economy has begun to recover and what impact Obama’s policies have had.

The poll also shows a virtual tie between Romney and former Pennsylvania Sen. Rick Santorum among Republican-leaning voters, though Republicans think Romney has the best chance to beat Obama and is most likely to win the nomination.

A 50-percent plurality of Americans now disapprove of the job Obama is doing, while just 46 percent approve. That is down from a 50-percent approval rating in early February, and it represents Obama’s lowest score on the question since the beginning of November.

Much more at the link.

Update:

https://twitter.com/#!/Drudge_Report/status/179182516794703873

Another update:

https://twitter.com/#!/Norsu2/status/179227476881457152