U.S. Senate hopeful Mitt Romney backed President Trump’s proposed $100 billion tariff threat to China Thursday night, arguing they will “wake up” China and force them to make real changes.

“I think the president is leading with some policies that will wake up our friends in China and they’ll recognize that business as usual is going to have to change,” Romney said. “China over the years has taken advantage of the attitude in America, which is we haven’t watched very closely and they’ve been cheating.”