James A. Amann, of Milford, the former speaker of the House who left the General Assembly to run for governor, is withdrawing his bid for the Democratic nomination.

Amann did not return calls for comment Wednesday afternoon, but a source with knowledge of Amann's plans said he will abandon the attempt to become the first Democratic governor since William A. O'Neill left office in January 1991.

Amann, a longtime member of the state House, served two consecutive two-year terms as speaker, but did not run for re-election to the Legislature in 2008 because he wanted to concentrate on succeeding Gov. M. Jodi Rell.

But without the public platform in the General Assembly, Amann stalled in fundraising and remained in the low single digits in state gubernatorial polls. According to his last campaign-finance filing with state officials, he had a little more than $1,000 on hand, with debts of about $29,000.

Amann could announce his withdrawal from the race as early as Thursday and would become the second Democrat in recent days to drop out of the crowded Democratic field. State Sen. Gary Lebeau, D-East Hartford, recently withdrew his exploratory bid for governor.

Dannel Malloy, the former Stamford mayor who lost the 2006 Democratic gubernatorial primary, has $443,250 in the bank, but he has to contend with the deep pockets of Greenwich millionaire Ned Lamont, who won the 2006 party primary for U.S. Senate, then lost when Sen. Joe Lieberman launched an independent re-election bid.

Lamont has not committed to participating in the state's public financing program this year because Tom Foley, the former ambassador to Ireland and national Republican fundraiser, said he will self-finance his bid to run for governor.

The still-crowded field of Democratic gubernatorial hopefuls includes Ridgefield First Selectman Rudy Marconi, who raised $54,000 in the last quarter of 2009, but spent nearly all of it.