Superdelegate Joe Andrew, who was DNC chairman appointed by Bill Clinton from 1999-2001, has switched his support to Barack Obama. The AP reports:

"I am convinced that the primary process has devolved to the point that it's now bad for the Democratic Party," Andrew said in a telephone interview with The Associated Press.

Bill Clinton appointed Andrew chairman of the DNC near the end of his presidency, and Andrew endorsed the former first lady last year on the day she declared her candidacy for the White House.

Andrew said in his letter that he is switching his support because "a vote for Hillary Clinton is a vote to continue this process, and a vote to continue this process is a vote that assists (Republican) John McCain."

"While I was hopeful that a long, contested primary season would invigorate our party, the polls show that the tone and temperature of the race is now hurting us," Andrew wrote. "John McCain, without doing much of anything, is now competitive against both of our remaining candidates. We are doing his work for him and distracting Americans from the issues that really affect all of our lives."

Andrew said the Obama campaign never asked him to switch his support, but he decided to do so after watching Obama's handling of two issues in recent days. He said Obama took the principled stand in opposing a summer gas tax holiday that both Clinton and McCain supported, even though it would have been easier politically to back it. And he said he was impressed with Obama's handling of the controversy surrounding his former pastor, the Rev. Jeremiah Wright.

This one stings. Why? Jake Tapper reminds us:

The youngest DNC chair ever endorsed Sen. Hillary Clinton's presidential bid last year, saying, "Hillary Clinton has the strength and experience to compete and win across this country. I have seen up close her intellect, character, and fortitude, and I am convinced she is the best prepared to handle these challenging times. Her 35-year record fighting for America's families is as impressive as she is, and demonstrates why she will be a great President of the United States."

"Joe was a strong leader who put the Democratic Party on the right path,” Clinton said. "I'm honored to have his support."