Republican elected officials endorsing Obama
Former Minnesota Governor Arne Carlson
Former Rhode Island Senator Lincoln Chafee.
Former Minnesota Senator David Durenberger
Former Virginia Governor Linwood Holton, father-in-law of current Governor Tim Kaine (D-VA)
Former Iowa Congressman Jim Leach.
Former Connecticut Governor and Senator Lowell Weicker.
Former Massachusetts Governor William Weld
Mayor Lou Thieblemont of Camp Hill, Penn. Thieblemont switched his party registration from Republican to Democrat so that he could vote for Obama in the Pennsylvania primary.
Fairbanks North Star Borough mayor Jim Whitaker endorsed Obama and delivered a speech on the second day of the 2008 Democratic National Convention in Denver, Colorado.
National Republican figures endorsing Obama
Ken Adelman, former diplomat and member of the Pentagon's Defense Policy Board
Former publisher of National Review, Wick Allison
Jack Antaramian, Florida real estate developer and Bush fundraiser
Julie Nixon Eisenhower, daughter of former President Richard Nixon, granddaughter-in law of Dwight D. Eisenhower
Susan Eisenhower, granddaughter of Dwight D. Eisenhower and president of the Eisenhower Institute.
Charles Fried, former U.S. Solicitor General and former McCain advisor.<38>
CC Goldwater, granddaughter of former Arizona Senator and Republican Presidential candidate Barry Goldwater (endorsing Barack Obama on behalf of herself, her sibling, and some of her cousins)
Lilibet Hagel, wife of Senator Chuck Hagel (R-NE)
Rita E. Hauser, Former White House intelligence advisor for George W. Bush
Actor and former Bush supporter Dennis Hopper
Larry Hunter, Senior Fellow at the Institute for Policy Innovation and Chief Economist for the Free Enterprise Fund, former Reagan policy advisor
Rear Admiral John Hutson, USN (ret.), former Judge Advocate General of the Navy and the current dean and president of Franklin Pierce Law Center.
Legal scholar Douglas Kmiec
Scott McClellan, White House Press Secretary under George W. Bush from 2003-2006. Author of controversial book, What Happened.
Tricia Mosley, former staffer to Senator Strom Thurmond
Paul O'Neill, United States Secretary of the Treasury from 2001-02 under George W. Bush
Colin Powell, former Secretary of State, National Security Advisor, and Chairman of the Joint Chiefs of Staff.
David Ruder, Chairman of the Securities & Exchange Commission under President Ronald Reagan
Frank Schaeffer, pro-life advocate and the son of evangelist Francis Schaeffer.
Radio Host Michael Smerconish
Andrew Bacevich, Professor of International Relations at Boston University.
Christopher Buckley, author, son of legendary conservative William F. Buckley, Jr.
Francis Fukuyama, author, key figure in the rise of neoconservatism.
Christopher Hitchens, author and essayist loosely affiliated with neo-conservative foreign policy.
Dorothy King, archeologist and conservative blogger.
Andrew Sullivan, libertarian commentator.
SOURCE: http://en.wikipedia.org/wiki/Obama_Republican
Note: I sent this list to Republican associates who say no "thinking" person would vote for Obama.