Ohio Gov. John Kasich took aim at President Donald Trump's plan for dramatic tax cuts during a speech at Harvard University.
"I don't think there's any way they can say 'okay we're gonna cut all these taxes and it's going to pay for itself,'" Kasich, told students at the Ivy League school's Institute of Politics, The Harvard Crimson reports.
Kasich, who ran unsuccessfully against Trump for the 2016 Republican presidential nomination, also criticized the commander in chief's campaign vow to "make America great again."
"You can't take a coal miner and just say 'tough' or say 'by the way I'm going to make America great again, we're going to reopen all the mines and it's going to be great.' It's not going to happen," he said.
The Ohio Republican also discussed what he believes are the fundamental problems of the American political system.
"Here's the thing that troubles me … and I think it's always been true: If you're poor, if you're weak, if you're young, you don't count," Kasich said.
"I think you listen, and then you do what you think you need to do. That's what I think leadership is ... Leadership means you walk a lonely road, and if people want to yell at you, well that's life."