On Thursday, a bipartisan group of senators reintroduced a bill that aims to block any future president from leaving NATO.

While President Biden would never consider leaving NATO, the bill would prevent any future president from exiting the outdated military alliance without the approval of two-thirds of the Senate. The legislation would make it as hard to leave NATO as it is to convict and remove a sitting president from office.

The legislation was introduced by Senators Tim Kaine (D-VA) and Marco Rubio (R-FL) and has 13 cosponsors; nine Democrats, two Republicans, and one Independent.

Since the end of the Cold War, NATO, which was meant to be a defensive alliance, has turned into an offensive force and has led wars of aggression in Bosnia, Yugoslavia, Afghanistan, and Libya. NATO currently has 30 member-states, 14 of which were added after the Cold War.