Donald Trump spent the majority of his campaign rally in Council Bluffs, Iowa on Wednesday attacking his opponent Hillary Clinton for being part of the political establishment and controlled by donors.

The Republican nominee also scrutinized her involvement with the controversial Clinton Foundation while she was secretary of state.

“Everything you need to know about Hillary Clinton can be understood with this simple phrase, ‘Follow the money,’” Trump told the supporters gathered to see him at the Mid America Center Convention Center on Wednesday afternoon.

“In her campaign for president, Hillary Clinton has received $100 million in contributions from Wall Street and the hedge funds,” Trump stated.

2,000 people RSVP'ed for Trump's Council Bluffs rally – about 1/2 are from red state Nebraska not swing Iowa, per an organizer @naomicorrie. — Jennifer Jacobs (@JenniferJJacobs) September 28, 2016

“She would put the oval office up for sale!” he exclaimed, alleging that Clinton Foundation donors were lobbying the Department of State while Clinton was secretary of state.

Trump's speech today in Council Bluffs, IA is hammering one message: That he's an outsider, change agent & she's a corrupt insider. — Jeremy Diamond (@JDiamond1) September 28, 2016

Trump had one central theme for first 19 minutes of Iowa speech: attacking Clinton. — Jennifer Jacobs (@JenniferJJacobs) September 28, 2016

Trump, in Council Bluffs: "I’ve spent a lot of money on my campaign … & I like it, because you know what? We’re not going to be controlled.” — Kenneth P. Vogel (@kenvogel) September 28, 2016

“This will be the year the American people say enough is enough,” Trump declared. “It’s time for real change.”