A group of Republican senators said Tuesday that they want President Donald Trump to put any final deal between the United States and North Korea before Congress for a vote.

“I think when you’re talking about something as profound as maybe ending a war that we’ve been in for about 70 years […] I think it should take congressional action to solidify it,” Sen. Thom Tills (R-N.C.) said of the deal, according to reports.  

Sen. Bob Corker (R-Tenn.), the Foreign Relations Committee chairman, echoed Tills’ comments, noting that any final agreement would likely be brought before Congress in the form of a treaty.

If that were the case, the deal would need to win over two-thirds of the chamber to pass.

“I think the lesson [of the Iran deal] is that if you try to do things unilaterally or just with the executive branch, that they don’t last long,” Senate Majority Whip John Cornyn (R-Texas) said, referencing President Trump’s dismantlement of the Obama-era deal.

“I’m not hung up on the form,” Cornyn continued, “but I do think it’s important that Congress give it the Good Housekeeping seal of approval, because I think that would ensure longevity.”

South Carolina Sen. Lindsey Graham (R) also said he thought the deal should be presented to and voted on by Congress, according to NBC.

“Anything you negotiate with North Korea will have to come to Congress for our approval,” Graham said. “Details matter.”

The push for a vote comes just after President Trump met with North Korean leader Kim Jong Un to discuss diplomatic relations between the two nations and nuclear weapons.

Both leaders signed a document detailing North Korea’s renewed commitment to the “complete denuclearization of the Korean Peninsula.”

According to the Associated Press, the document also describes “security guarantees” granted by President Trump in exchange for the denuclearization deal.

After the meeting, Trump hinted at these guarantees by announcing the U.S. would stop military exercises with South Korea as negotiations with the north continue.