Topeka ? Republican presidential candidate Rick Santorum has added an event in Topeka to his Friday schedule and announced an endorsement by former Kansas Congressman Todd Tiahrt.

State coordinator Greg Cromer says Santorum plans a 1:30 p.m. rally at the Great Overland Station, a former Union Pacific railroad depot in north Topeka.

He’ll go from there to a late-afternoon rally at Jabara Airport in Wichita.

Santorum’s campaign announced the Tiahrt endorsement Thursday. Tiahrt represented the 4th Congressional District of south-central Kansas for 16 years and is now a member of the Republican National Committee.

Santorum also received endorsements from six conservative legislators and some leaders of the anti-abortion group Kansans for Life.

Kansas Republicans hold caucuses on Saturday at 96 locations across the state.