Complex sentence: On July 24,2013, Bevin announced that he would challenge McConnell, the Senate Minority Leader and a five-term incumbent, in the 2014 Republican primary because he did not believe that McConnell was conservative enough.
Split into simpler sentences: On July 24,2013, Bevin announced that he would challenge McConnell, a five-term incumbent who was the Senate Minority Leader at the time, in the 2014 Republican primary. He said he was running because he did not believe that McConnell was conservative enough.