According to Public Policy Polling’s most recent national survey, “While Obama had a positive approval rating at 48/47, only 33% of voters were more likely to vote for a candidate endorsed by him while 48% said support from Obama would make them less likely to vote for someone.”

This is simply astonishing. So is this:

To put into perspective the perils of having Obama out on the campaign trail, consider the numbers in his home state of Illinois. Even there just 26% of voters say they’d be more inclined to back an Obama endorsed candidate while 40% say his support would be more likely to turn them against a candidate. It’s another example where the intensity of feeling about Obama is much stronger on the GOP side- 80% of Republicans say they’re less likely to vote for someone with the President’s support while only 49% of Democrats say they’re more likely to. If Obama’s support isn’t a net positive in Illinois it’s hard to know where he should be deployed.

PPP refers to this as “The Obama Effect.” Before he’s done, it may cripple the Democratic Party.