It was a small surprise when the doyen of the Kennedy clan, Ted Kennedy, endorsed Barack Obama for President. Many expected he would endorse Hillary Clinton. It is no surprise the Moveon.org has endorsed Obama. The most respected Republican President of the Twentieth century was Ike, and it is a surprise that his grand-daughter Susan has endorsed Obama, and promised to work for him. This is cause for envy by Hillary, but it is cause for worry by diehard Republicans.
Susan Eisenhower - Why I'm Backing Obama - washingtonpost.com
Also see this piece on why Republicans like Obama.