He couldn't have won reelection without their enthusiastic support, but now younger voters are abandoning President Obama, logging a depressing 43 percent approval rating for their political hero in a new poll.

The just-released Economist/YouGov poll reports that only older Americans age 65 and above have a worse view of the president, with 53 percent disapproving of his performance and 47 approving.

Among voters aged 18-29, 49 percent disapprove of Obama's job performance while 43 percent approve. The rest are not sure.

"Although they were a critical part of his electoral victory, the youngest Americans age 18-29 are not thrilled," found the poll. In the last election, Obama won 60 percent of the youth vote.

Overall, the poll wasn't much better for Obama, with his approval rating at 47 percent, with 46 percent disapproving of his job performance.