Rudy Giuliani formally dropped his presidential bid and endorsed John McCain Wednesday, setting up the Arizona senator with valuable support and big press heading into the GOP primary debate in California.

Giuliani pledged to campaign with McCain wherever he is needed, and touted his former rival as an “American hero” and “the most qualified candidate to be the next commander in chief of the United States.”

Giuliani spoke at the Ronald Reagan Presidential Library in Simi Valley, Calif., where the Republican debate was being held just two hours later.

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