Vice President Biden will be the keynote speaker at Sen. Tom HarkinThomas (Tom) Richard HarkinWisconsin lawmaker refuses to cut hair until sign-language bill passes Iowa’s Ernst will run for reelection in 2020 California primary threatens to change 2020 game for Dems MORE’s (D-Iowa) steak fry fundraiser in September, according to reports.

“It has been a long-standing commitment after the Vice President was unable to attend last year,” a representative for Biden told The Des Moines Register.

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Harkin’s annual steak fry, which will be held Sept. 15, is one of Iowa’s marquee Democratic events and a past stop for many potential presidential contenders. 

San Antonio Mayor Julian Castro will also speak at the fundraiser.

Biden has declined to rule out a 2016 presidential run and has made a number of visits to early-voting states. 

The vice president visited Iowa in January and South Carolina in May. Later this month he will attend a fundraiser for New Hampshire Gov. Maggie Hassan (D) in neighboring Maine. 

Polls show former Secretary of State Hillary ClintonHillary Diane Rodham ClintonSanders campaign reports raising M in less than a day The Memo: Bernie Sanders’s WH launch sharpens ‘socialist’ question Roger Stone invokes gag order in new fundraiser MORE, who has not said whether she will consider a 2016 run, the early Democratic favorite.