One day after U.S. President Donald Trump became the first sitting president to enter North Korea, Chuck Schumer, the Democratic Senate Minority Leader, criticized the president for his weekend meeting with North Korean Supreme Leader Kim Jong Un.

“This was one of the worst few days in American foreign policy and American diplomatic history in a long time,” Schumer said while speaking with Anderson Cooper on CNN, according to a report from The Hill.

Schumer was highly critical of the president’s relationship with the North Korean dictator and of his foreign policy moves in general. CNN reports that Schumer claims President Trump’s foreign policy style “hurts us in the long run.”

“Praising dictators, messing up foreign policy left and right, what he did in North Korea giving Kim Jong Un what he wanted, calling him a friend, patting him on the back, and getting nothing, absolutely nothing in return,” said Schumer during the interview.