The Wall Street Journal editorial board is calling for Senate Republicans to push President Trump to take a tougher stance on Russia as the president tries to negotiate an end to the war in Ukraine.

“Mr. Trump may be the only person in the world still surprised by how Mr. Putin is behaving. The Russian is the same man he’s been for two decades, bent on reconstituting as much of the old Soviet empire as he can get away with,” the Journal wrote in an editorial published Monday.

Trump expressed frustration at his Russian counterpart in a Truth Social post this week, saying “he’s killing a lot of people, and I don’t know what the hell happened to Putin.”

The Journal argued Trump’s “naivete is helping Russia continue the killing as long as Mr. Putin wants.”

It said some Senate Republicans have the right idea on Russia.

“As [South Carolina] GOP Sen. Lindsey Graham writes in a letter nearby, he has 82 co-sponsors on a bill that would hit countries that buy Russian oil and gas with tariff sanctions,” the Journal wrote. “Energy sales are Mr. Putin’s financial lifeline. President Biden refused to apply these so-called secondary sanctions, and Mr. Trump can’t make up his mind.”

The Journal has been sharply critical of Trump during his first several months in office, knocking him over his policies on trade, the economy and foreign policy.