Some weeks ago, the South Carolina Republican Party set a presidential primary filing deadline of September 30, 2015. That is easily the earliest such deadline in the nation for the 2016 presidential primaries. No other presidential primary has a deadline earlier than November 2015.
Here is the list of the 15 candidates who paid the $40,000 filing fee. Half the money goes to government election officials, and half goes to the state Republican Party. The party does not pay for any of the administration of the presidential primary.
The only candidate on the list who has not been allowed to participate in the debates so far is former Virginia Governor Jim Gilmore.