According to CNN, Barack Obama has just overtaken Hillary Clinton in superdelegate support.

U.S. Rep. Tom Allen (D-ME) is the latest of Clinton’s longtime friends to endorse Obama.

In a statement released by the Obama campaign Monday, Allen said both Democratic candidates were “supremely qualified” to be president.

“I have been friends for a very long time with former President Clinton and Senator Clinton. I respect their service to our nation. Hillary Clinton has run a vigorous campaign and has attracted a passionate following in Maine and around the country. She loves this country and is a true leader. For her service, I am grateful,” he said.

“Most of the primary voters across the nation have now spoken. It is time to bring a graceful end to the primary campaign. We now need to unify the Democratic Party and focus on electing Senator Obama and a working majority in the United States Senate…”

Allen is also a senatorial candidate.

Allen’s support means that Obama now leads Clinton, 274 superdelegates to 273, according to CNN’s estimates. She had begun 2008 leading in superdelegates by 100.

Clinton now trails in every significant indicator in the presidential race.