On December 15, the Kentucky Republican Party informed the State Board of Elections not to hold a Republican presidential primary. Instead the party will hold a caucus. Although the party had made that decision several months ago, it waited until December 15 to make the decision binding.
Here is the Republican Party’s web page concerning its March 5 caucus. Paper ballots will be used. Candidates have until January 7, 2016, to file. So far eight candidates have paid the $15,000 filing fee.