TOPEKA, Kan. (AP) – Both Democrats and Republicans are wondering whether their presidential caucuses in Kansas will be rocky soils for their front-runners.

GOP leader Donald Trump was making an appearance Saturday in Wichita just before voting started there. Challenger and Texas Senator Ted Cruz also was visiting and Florida Senator Marco Rubio had three campaign events Friday.

In Kansas, the billionaire businessman seemed more the insurgent. Most of the state GOP’s top elected officials and rank-and-file activists also were split between Cruz and Rubio.

Clinton had a different challenge. The former U.S. secretary of state is the choice of former Governor Kathleen Sebelius and other state party establishment figures.

Her supporters worried about a surge of new voters and energized progressives boosting Vermont Senator Bernie Sanders’ challenge.