This AP-GfK poll shows Obama at a new low in approval. But congressional Democrats are really in hot water:

For the first time this year, about as many Americans approve of congressional Republicans as Democrats — 38 percent to 41 percent — and neither has an edge when it comes to the party voters want controlling Congress. Democrats also have lost their advantage on the economy; people now trust both parties equally on that, another first in 2010.

Roughly half want to fire their own congressman.

Adding to Democratic woes, people have grown increasingly opposed to the health care overhaul in the weeks since it became law; 50 percent now oppose it, the most negative measure all year. People also have a dim view of the economy though employers have begun to add jobs, including 162,000 in March. Just as many people rated the economy poor this month — 76 percent — as did last July.

And it could get worse for Democrats: One-third of those surveyed consider themselves tea party supporters, and three-quarters of those people are overwhelmingly Republicans or right-leaning independents. That means they are more likely to vote with the GOP in this fall’s midterms, when energized base voters will be crucial amid the typical low turnout of a non-presidential election year.

The Obami and the congressional Democrats can hardly be surprised that the voters, who’ve consistently registered disapproval of their agenda, now want to dump them in favor of those who will listen. It shouldn’t surprise the Democrats that really, honestly, the public doesn’t like ObamaCare and really, honestly, don’t care for the rest of the aggressive ultra-liberal agenda. (One small-business owner implored them: “Slow down! Breathe! Think!” Hmm. Could fit on a bumper sticker.) A severe and emphatic message is awaiting lawmakers who cavalierly ignored the electorate. As Obama says, it’s what elections are for.