The 2016 clown car can't get much longer -- but the Republican National Committee can't be bothered.The Republican Party has a bit of mess on its hands heading into the 2016 election season. Simply put, too many Republicans want to be president. The field of declared and potential candidates is large and in flux, and this will leave the Republican National Committee with some tough choices to make when debate season starts up. How do they decide who makes the cut for debate invitations? Do they go by polling numbers and risk letting a clown like Donald Trump through while...