The story

California Gov. Arnold Schwarzenegger will announce Thursday he is endorsing Republican presidential candidate Sen. John McCain, two GOP sources familiar with the situation told CNN.

Schwarzenegger will make the announcement in California, a day after the four Republican candidates debated at the Ronald Reagan Presidential Library in Simi Valley.

McCain is also set to receive the endorsements of Georgia's two Republican senators, Johnny Isakson and Saxby Chambliss, in the next two days, according to two GOP sources involved in the planning.

California and Georgia are two of the 22 states holding nominating contests on Super Tuesday next week.

Schwarzenegger's endorsement could be a key to McCain winning California's 170 delegates. Florida Gov. Charlie Crist's endorsement of the Arizona senator was cited in exit polls as a key to his winning there. McCain solidly beat former Massachusetts Gov. Mitt Romney and gained momentum with the win. Read full article »

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

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