UPDATE: Clinton to Acknowledge Obama Delegate Count

WASHINGTON (AP) - It has been a busy day of political developments.

Tuesday morning the Associated Press reported that Hillary Clinton would concede Tuesday night that Barack Obama had the delegates to secure the Democratic nomination.

Terry McAuliffe, Clinton's campaign chairman, refuted the AP story saying Clinton is not ready to concede anything. In a formal statement, her campaign said that Clinton "will not concede the nomination" in a speech she will give tonight. But aides say she is prepared to acknowledge that Barack Obama has enough delegates to be the Democratic nominee, if he reaches that milestone. Clinton told New York lawmakers she's open to being Obama's vice presidential candidate.

Former President Carter says he'll endorse Democrat Barack Obama after the polls close on the final primaries. Carter told The Associated Press on Tuesday: "The fact is the Obama people already know they have my vote when the polls close tonight."

Carter spoke to the AP after addressing the Georgia World Congress Center. Carter, a superdelegate, has remained officially neutral in the race but has offered high praise to Obama. 

South Dakota and Montana are both holding primaries Tuesday.