In Iowa, Trump said he was the "last chance" to fix immigration and trade. Supporters near Pittsburgh booed a song by musician Bruce Springsteen, who is set to campaign with Clinton on Monday night. As rocker and guitarist Ted Nugent warmed up a Trump rally in a Detroit suburb, he grabbed his crotch. "By the way, my language is much, much cleaner, as you know, than Jay Z," Trump said at the same event. Trump has criticized crude language in a Friday night concert that rapper Jay Z and his wife, Beyonce, held for Clinton in Cleveland.