Complex sentence: Bevin is running in Kentucky's 2014 Senate election in the Republican primary for the seat currently held by Senate Minority Leader Mitch McConnell, a five-term incumbent.
Split into simpler sentences: Bevin is running in Kentucky's 2014 Senate election as a Republican (GOP). The current holder of the seat is Republican (GOP) Senate Minority Leader Mitch McConnell, a five-term incumbent.