DES MOINES, Iowa — Bill and Hillary Clinton will headline the annual steak fry for retiring Sen. Tom Harkin of Iowa, making a big return to the leadoff caucus state as the former secretary of state considers another presidential campaign.

Sam Roecker, a spokesman for the Harkin Steak Fry, says Monday that both Clintons will speak at the fundraiser in Indianola, just south of Des Moines, on Sept. 14. It will be the former first lady’s first appearance in Iowa since 2008. She is the leading Democratic presidential contender, and the event is among her first campaign appearances before the 2014 midterm elections.

Clinton has said she intends to campaign for Democratic candidates this year. Iowa is the home of a key Senate race, and its presidential caucuses will begin the 2016 nomination process.