John Boehner exits: Who is Kevin McCarthy?

House Majority Leader Kevin McCarthy (R-CA), left, speaks while flanked by House Speaker John Boehner (R-OH) during a news conference at GOP headquarters on Capitol Hill July 22, 2015, in Washington, DC. (Credit: 

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Pope Francis waves to a crowd from the Speaker's Balcony on the West Front of the Capitol as he stands with Vice President Joe Biden, left, House Majority Leader Kevin McCarthy, third from right, Speaker of the House John Boehner, second right, and 

Pope Francis waves to a crowd from the Speaker's Balcony on the West Front of the Capitol as he stands with Vice President Joe Biden, left, House Majority Leader Kevin McCarthy, third from right, Speaker of the House John Boehner, second right, and 

John Boehner announced Friday that he'll be stepping down as the speaker of the US House of Representatives. Given the advantage of incumbency, Republican, majority leader Kevin McCarthy is expected seek the speaker's job. Although McCarthy has not