This would be the second major polling firm to find Obama falling below 40% as Gallup has had him in the 30s for a few weeks.

WASHINGTON — President Barack Obama’s job approval rating has plunged to a dismal 39 percent, the lowest of his presidency, as increasing numbers disapprove of his handling of the nation’s ailing economy, according to a new McClatchy-Marist poll.

The low job approval rating among registered voters, down from 44 percent last month, suggests enormous trouble for a president who faces re-election in 14 months.

The 52 percent who disapprove of Obama’s performance represents the first time that number has climbed over 50 percent.

“These numbers could typically spell doom for an incumbent,” poll director Lee Miringoff said.