While a bare majority of voters in solidly blue California still approve of President Obama's job performance, dissatisfaction with his leadership on key issues has increased significantly - especially among those who were once solidly part of his base, according to a Field Poll released Tuesday.

And in a finding that could affect Obama's fellow Democrats as they head into the 2014 elections, the poll shows that just one-third of California voters surveyed say the country is moving in the right direction, while 55 percent believe it is "seriously off on the wrong track." That's a significant decline from February, when 48 percent said the country was on the right track and 44 percent said it was on the wrong track.

The 51 percent of respondents who approve of Obama's performance represents an 11-point slide in the Field Poll since the start of his second term. His disapproval rating stands at 43 percent.

Among those souring on the president are groups that have been among his strongest supporters, the poll showed - Latinos (a 16-point jump in disapproval), union households (18 points) and women (13 points).

Even among Democrats overall, Obama's negative rating is 18 percent, double the total in July.

Mark DiCamillo, director of the Field Poll, said the downward trend is cause for concern for the Democratic Party as it looks toward the 2014 midterm elections.

Obama started his second term with a positive job rating of nearly 2-1, DiCamillo noted, "and now it's only 5-4. And what's most disturbing is that the biggest declines over that period are coming from his base, voters he carried by a huge margin. That's unusual ... because it puts more voters in play if they're becoming disaffected."

The sliding right track versus wrong track numbers show that the botched implementation of Obama's signature accomplishment in domestic policy, the Affordable Care Act, is taking a toll on voter confidence, DiCamillo said. "Now people are not feeling good, even with a Democrat in the White House," he said.

Obama's approval-disapproval numbers on the issue of health care have suffered markedly, the poll showed. Half of those surveyed disapprove of Obama's performance in that area, compared with 43 percent who approve. In March 2010, when the health care law was approved, the numbers were split, 45-45 percent.

On foreign policy, Obama's approval-disapproval ratings are now 49-40 percent, down significantly from October 2009, when he enjoyed a 58-29 percent advantage, the poll showed.

The Field Poll surveyed 766 registered voters in California from Nov. 14 to Dec. 1. The margin of error on the overall job-approval rating was plus or minus 3.5 percentage points; among the smaller sample groups, the margin of error was plus or minus 4.5 points.