AUGUSTA (AP) – Two of Maine’s three undeclared Democratic superdelegates announced Tuesday they’re endorsing Barack Obama for president.

Jennifer DeChant, Democratic National Committeewoman for Maine, was the first to make her announcement late in the morning.

National Committeeman Sam Spencer made his announcement after the polls closed for the final presidential primaries in South Dakota and Montana.

With DeChant and Spencer in the Obama column, Maine’s national delegate total is 21 for Obama and 10 for Hillary Rodham Clinton, with one superdelegate not yet committed.

DeChant said it became clear after the party’s state convention last weekend that Obama is the choice of a majority of the state’s delegates.

For his part, Spencer said he waited after the polls closed at 10 p.m. EST because he felt it was important to wait until all primaries and caucuses had been completed and the votes counted, to make the process as inclusive as possible.

“Senator Obama is an extraordinary candidate and has inspired Democrats in Maine and across the country to show their support in record numbers. Now we must work to sustain this momentum into the national election to take back the White House,” Spencer said in a statement.

On Sunday, state convention delegates ratified the party chairman’s nomination of Gwethalyn Phillips of Bangor, a former state party official, as an “unpledged add-on” delegate as specified in party rules. Phillips is an active Obama supporter.

Maine’s only uncommitted superdelegate is U.S. Rep. Mike Michaud, a former John Edwards supporter, was not expected to announce a new endorsement until the final primaries in South Dakota and Montana were over, said spokesman Ed Gilman.

Spencer, for one, encouraged superdelegates to join him in pushing for Obama to select Clinton as his running mate. “It is my own belief that an Obama/Clinton ticket would be the strongest team possible and would help unite our party after the long nomination fight,” he said.