Sen. Mitt Romney (R-Utah) on Monday took an implicit shot at President Trump’s approach to certain world leaders, arguing that Russian President Vladimir Putin and North Korean leader Kim Jong Un “deserve a censure rather than flattery.”

Romney made the remarks during a speech at a conservative think tank in Salt Lake City, according to The Salt Lake City Tribune. The newspaper noted that the Republican senator did not mention the president by name during his remarks.

“I think demonstrating personal character is one of the most important responsibilities of a leader of the land,” Romney said, according to the Tribune.