Vilsack Backs Clinton

In this campaign video, former presidential candidate Gov. Tom Vilsack (D-Iowa) endorsed Sen. Hillary Rodham Clinton (D-N.Y.) for the Democratic nomination Monday.

"Sen. Clinton, I am proud to support you in your effort to be ht next president of the United States," Vilsack said.

"Hillary Clinton has been tried and tested like no other candidate for president. She is prepared to run a tough race and to win that race," he added.

Vilsack also announced Monday that he would serve as co-chairman of Clinton's national campaign and that his wife, Christy, would be co-chairman of her Iowa campaign.