STUDIO CITY (CBSLA.com) —  Three prominent republicans entered the race for U.S. president this week.

Mike Huckabee, Ben Carson and Carly Fiorina are now seeking the nomination.

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However, Claremont McKenna College Professor Jack Pitney believes their chances of winning the nomination are slim.

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“The bottom line is that the frontrunners for the nomination are Jeb Bush, Marco Rubio and Scott Walker and the entrance of these candidates doesn’t really change that,” he told KCAL9’s Amy Johnson Saturday morning.

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Claifornia’s republican presidential primary is scheduled for June 7. The Republican National Convention, where the party selects its nominees for president and vice-president, is scheduled for July 18-21.