Republicans for Obama
"Their reasons for defecting from GOP presidential candidate John McCain range from the war in Iraq to overspending in Washington and indicate displeasure not just with McCain’s candidacy, but with the Republican Party as a whole." 
- Dorothy Danforth Burlin - a Washington lawyer who is the daughter of former U.S. Senator John Danforth, another moderate Republican.
- Lincoln Chafee - former U.S. senator from Rhode Island.
- Rita Hauser - fundraiser for Presidents George H.W. Bush and George W. Bush. Hauser endorsed Senator John F. Kerry in 2004, because of her opposition to the Iraq War.
- Douglas Kmiec - a Republican who served in the Justice Department under President Ronald Reagan and was a supporter of Mitt Romney during the Republican primary.
- James Leach - former U.S. representative from Iowa.
- Jim Whitaker, mayor of the Fairbanks North Star Borough in Alaska.  
- http://www.republicansforobama.org/ Official Website