Donald Trump revived his controversial Jan. 6 “fight like hell” message at a campaign rally — using the same phrase that many have criticized as an incitement to violence at the U.S. Capitol.

Trump also evoked other rhetoric from Jan. 6 at all four of his rallies in Iowa on Friday and Saturday, warning supporters that it’s their last “battle” to take control of the nation.

He also ominously warned that there will be “big, big trouble” if the U.S. Supreme Court doesn’t keep him on the Colorado and Maine primary ballots. “Does everyone understand what I’m saying?” he asked his supporters at a rally in Sioux Center Friday.