The story

Former New York Mayor Rudy Giuliani ended his GOP presidential race and endorsed rival Sen. John McCain of Arizona on Wednesday.

And sources say California Gov. Arnold Schwarzenegger might endorse McCain on Thursday.

"This is a man who is prepared to be president," Giuliani said of his "old friend."

Giuliani said McCain gives the Republican Party the best chance to hold onto the presidency.

"I am very proud to endorse my friend and fellow Republican -- a hero -- John McCain," Giuliani said at the Ronald Reagan Presidential Library in Simi Valley California, two hours before the Republican presidential candidates were to face each other in their final debate before the Super Tuesday contests next week. Read full article »

CNN's Gloria Borger, John King, Alexander Mooney, Bill Schneider and Paul Steinhauser contributed to this report.

All About U.S. Presidential Election

Don't Miss