Senator Mitch McConnell from Kentucky has drawn parallels between today’s political climate and that of the United States before World War II, notably concerning tariffs and foreign policy.

In a conversation with the Lexington Herald-Leader, published on Wednesday, McConnell reflected on his extensive tenure as the Republican leader in the Senate. He outlined his intention to devote his remaining time in public service to what he deems crucial: defense and foreign policy.

“I think this is the most dangerous period since before World War Two,” McConnell said in the interview, which was conducted on Friday.

He highlighted that there are current conditions reminiscent of the 1930s, particularly referencing the Smoot-Hawley tariff act of 1930, which is believed by many historians and economists to have exacerbated the global depression.

President Donald Trump has similarly imposed extensive tariffs on a number of U.S. allies and major trading partners. His aim has been to renegotiate agreements he believes will correct trade imbalances to benefit the U.S. His administration has also emphasized the revenue coming from these tariffs, which are ultimately paid by American consumers purchasing imported goods.

McConnell also observed parallels between present-day critics of U.S. global intervention and those who held similar isolationist views before the country’s involvement in World War II.

He further voiced concerns about the U.S. possibly not being adequately prepared for the emerging coalitions among nations that have an adversarial stance toward the United States.

On the same day the interview was published, Chinese President Xi Jinping, North Korean leader Kim Jong Un, and Russian President Vladimir Putin appeared in public together for the first time, as Xi hosted the others as guests for his military parade in Beijing.

“Those who were totally anxious to stay out of all of what was going on in Europe were called ‘America First.’ Sound familiar? So what do we have today? North Korea, China, Russia, Iran and Iran’s proxies. They’re very different kinds of countries, but they have one thing in common: They hate us,” McConnell said. “So, when you talk about preparedness, we’re not prepared like we should be.”

McConnell also warned against failure in Ukraine as the U.S. president seeks to broker a peace deal to end the war with Russia.

“With regard to Ukraine, what we need to do is avoid the headline at the end of the war, ‘Russia wins, America loses.’ It has huge worldwide implications,” McConnell said.

“And for those who are concerned about the money, I think it’s important to remember that about half of the money was spent in this country, including in Kentucky, [with] 38 states modernizing our own industrial bases. We’ve sent older weapons to Ukraine,” he continued.

McConnell, the longest-serving Senate leader in history, announced last year that he would step away from his leadership role and retire from the Senate entirely at the end of his term next year.