Bruce Vincent Rauner (born February 18, 1957) is an American businessman, philanthropist, and politician. He is the 42nd and current Governor of Illinois, serving since January 12, 2015. Prior to his election, he was the Chairman of R8 Capital Partners and Chairman of the private equity firm GTCR, based in Chicago. He was the Republican nominee in the 2014 Illinois gubernatorial election and defeated Democratic incumbent Governor Pat Quinn.