Washington - Scott McClellan, the former White House spokesman and once a close confidant of President George W Bush, has said he will vote for Democratic presidential candidate Barack Obama on November 4.

McClellan, who has since fallen out with Bush after sharply criticizing the president in his memoirs this spring, said Obama was best placed to change the way Washington does business, according to excerpts of a CNN interview to be broadcast on Saturday.

McClellan served as White House press secretary from 2003 to 2006. He had been a part of Bush's media team since his days as governor of Texas in the 1990s.

If the beginning of this week had the former Secretary of State, Colin L. Powell, announcing his endorsement of Obama, the end of the week has former White House Press Secretary, Scott McClellan, going Obama’s way too.

The accomplished Bush loyalist no more who has an uncanny knack for dropping bombshells, did it this time around with his tell-all book about life and lies in President Bush’s inner circle. The book has McClellan bashing his former bosses in the Bush administration.

McClellan’s declaration of Obama endorsement, taped for a new weekend CNN show, “D.L. Hughley Breaks the News,” comes through his dramatic statement that he has a favorite in the presidential election, and “it is not John McCain.”