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Sen. Chuck Grassley Introduces The Donald At Trump Rally In Iowa

AP Photo / Jacquelyn Martin

According to Des Moines Register reporter Jennifer Jacobs, Grassley will introduce Sen. Marco Rubio at a rally in Iowa next week.

Grassley told Trump supporters that he was "excited to be invited to be here," according to Politico.

"I'm excited to see the big crowds because of the big energy that comes with it and we've got to keep up this energy that's shown here today and many other places around Iowa because that is what is going to take for us to win back the White House in November," he said.

The Iowa senator also railed against President Obama and Hillary Clinton in his speech at the Trump rally, according to Politico.

"We need a new commander and chief and that obviously is not Hillary," he said.

"There's so much at stake for us in America. We've had eight years of unconstitutional actions to fix," Grassley continued, according to Politico. "We've got a president who is out of control and government can soon be out of control."

Trump has not received any endorsements from members of Congress or governors, but as the primary appears to be boiling down to a choice between Trump and Sen. Ted Cruz (R-TX), some members of the Republican establishment have said they would prefer Trump over Cruz.