A “Hillraiser” – a major fundraiser for Hillary Clinton – said Friday he had defected to Barack Obama’s campaign. The official announcement will be made next week.

Gabriel Guerra-Mondragon – who served as ambassador to Chile during the Clinton administration – had raised close to half a million dollars for Clinton’s campaign, reports Chuck Todd, who broke the story.

Guerra-Mondragon told the Washington Post. "Looking at it as coldly as I can, I just don't see how Senator Clinton can overcome Senator Obama with delegates and popular votes. I want this fight to be over, the quicker the better."

He added that leaving the Clinton campaign for Obama's "was a very, very difficult decision for me to make. I am an old and longtime friend of Senator Clinton. And I continue to think she is a fantastic and formidable person. But I am first of all a Democrat."