RNA - "This was one of the worst few days in American foreign policy and American diplomatic history in a long time," Schumer said on Monday in an interview with CNN's Anderson Cooper.
Trump made history Sunday as the first sitting US president to cross into North Korea.
But Schumer called out the president for calling Kim "a friend" without the country making any concessions on nuclear power.
"They have more nuclear bombs than they’ve had in the past. They are a danger to the United States and he pats the guy on the back and gets nothing in return," Schumer added.
Schumer stated that Trump used to criticize past presidents for being unable to denuclearize North Korea, but noted Trump's "erratic" policies are even more detrimental to the US.
"It's reality show foreign policy. He wants that photo op, he wants that little hit," Schumer said, adding, "He had no strategic, long range sense of where to go or what to do, and if anyone thinks this doesn’t hurt America in the short term and the long run They're sadly mistaken."
Schumer's remarks echo comments Democrats seeking the 2020 nomination made Sunday, panning the president's North Korea visit.