Topeka ? Republican presidential hopeful Ben Carson has filed for the Kansas Republican presidential caucus.

The Kansas Republican Party said in a release Friday that Carson is the fourth presidential candidate to file in Kansas.

Clay Barker, executive director of the Kansas Republican Party, says he has received a check for the $15,000 filing fee from Carson’s campaign. Carson, a neurosurgeon seeking the GOP candidacy for president, has made several stops in Kansas recently.

The Wichita Eagle reports that other candidates to pay the caucus fee so far are Ohio Gov. John Kasich, former Florida Gov. Jeb Bush and real estate mogul Donald Trump.

The caucus takes place the first week of March at several locations around the state.