Frankfort, KY – Texas congressman and presidential hopeful Ron Paul is the third Republican to enter Kentucky's May 22nd primary election. The Paul campaign made it official yesterday, just before today's filing deadline. Mitt Romney and Newt Gingrich have also filed to run in the commonwealth. Because of the timing of Kentucky's primary, presidential nominees typically are decided before Kentucky voters have their say. But the state could be important this year in an especially close race.