Senate Homeland Security Chairman Ron Johnson Ronald (Ron) Harold JohnsonGOP set to release controversial Biden report Democrats fear Russia interference could spoil bid to retake Senate The Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill MORE (R-Wis.) said on Sunday that President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE needs to keep up "maximum" pressure on North Korea ahead of an unprecedented summit.

“Let’s not be snookered again,” Johnson said on CNN's "State of the Union." “Let’s not be Charlie Brown to North Korea’s Lucy.”

Johnson noted that he joined in a letter with five other Senators “encouraging President Trump to make sure to maintain that maximum pressure until we see complete verifiable and irreversible denuclearization within North Korea.”

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Trump announced on Thursday that would accept an invitation to meet with North Korea’s leader Kim Jong Un, the first sitting U.S. president to do so.

According to South Korea, North Korea is willing to stop missile testing while talks with the U.S. are ongoing.

Johnson said on Sunday that for talks with North Korea to be successful, the president has to keep up pressure on the regime and even "ratchet up" sanctions.

“What we can’t do is what we did with Iran, let out the pressure and then just watch the behavior go in the wrong direction,” Johnson said.