The current GOP front runner has said he would end the war in Ukraine in one day — a promise that has sparked concern from Ukrainian leaders, who fear that Trump’s simplistic plan would involve the U.S. attempting to cede Ukrainian land to Russia.

Putin’s unprovoked invasion into Ukraine has been widely condemned and fought against by the U.S. and its Western allies.

During the interview, Trump touted what he described as a positive relationship with Putin, while claiming that “there was nobody tougher than me on Russia.”

“I got along with Putin. Let me tell you, I got along with him really well. And that’s a good thing, not a bad thing,” Trump said. “He’s got 1,700 nuclear missiles. And so do we. But, look, that’s a good thing. Getting along is OK. But I got along through strength.”

Trump drew criticism for sometimes siding with Putin during his presidency. At a summit in Helsinki in 2018, Trump said he believed Putin over U.S. intelligence agencies when he said Russia had not meddled in American elections. “President Putin says it’s not Russia. I don’t see any reason why it would be,” he said.