Congressman Lloyd Doggett announced Wednesday that he endorses Senator Barack Obama for president.

Doggett is a superdelegate to the Democratic National Convention.

Superdelegates include Democratic members of congress, governors and big-name party members -- including Bill Clinton.

Superdelegates don't have to commit to a candidate until they vote at the national convention -- and their vote does not have to reflect the popular vote.

An Associated Press count Wednesday showed a total of 239 superdelegates backing Clinton and 169 supporting Obama -- leaving 387 still undeclared.

"When he stands up, all the world will know that America really has changed, that the disastrous policies of the last eight years have ended," Doggett said in a media release.

He represents the 25th District of Texas. It includes Hays, Caldwell and Bastrop counties and part of Travis County, including part of Austin.

"My decision is not based on what is wrong with another candidate, but what is right with him," Doggett said.