WASHINGTON (AP) — A growing chorus of once-confident Democrats now say President Barack Obama could lose the November election.

The hand-wringing reflects real worries among Democrats about Obama's ability to beat Republican rival Mitt Romney, who has proven to be a stronger candidate than many expected. But it's also a political strategy aimed at rallying major donors who may have become complacent.

Interviews with a dozen Democratic strategists and fundraisers across the country show an increased sense of urgency among Obama backers. It follows a difficult two weeks for the president, including a dismal report on the nation's unemployment picture, a Democratic defeat in the Wisconsin governor recall election and an impressive fundraising month for Romney and Republicans.