Sen. Bernie Sanders (I-Vt.) said there is one thing he agreed with President Trump about, curbing illegal immigration and the flow of fentanyl into the country.

Sanders joined ABC News’s “This Week,” where host Johnathan Karl asked if there was anything Trump has done right.

“I think cracking down on fentanyl, making sure our borders are stronger,” Sanders replied. “Look, nobody thinks illegal immigration is appropriate, and I happen to think we need comprehensive immigration reform, but I don’t think it’s appropriate for people to be coming across the border illegally.”

While the senator agreed with Trump on strengthening the country’s borders to protect citizens, he disagreed with the president’s mass deportation plan.

“He wants to deport 20 million people who are in this country who are undocumented,” Sanders said. “Well, you do that, you destroy the entire country.”

“Because I got news for you, Trump’s billionaire friends are not going to pick the crops in California that feed us. They’re not going to work in meat packing houses,” he continued. “That’s what undocumented people are doing.”

Sanders has emerged as one of the left’s loudest voices against the Trump administration and tech billionaire Elon Musk.

He’s launched a speaking tour across the country, now joined by Rep. Alexandria Ocasio-Cortez (D-N.Y.), and titled Fighting Oligarchy. Over the weekend, more than 30,000 people attended a rally they held in Denver.