

If the US leaves NATO, Europe would lose a lot of support.
If the US stays in NATO, they would refuse to support them anyway and could use their veto power to stop any potential action.
If they’re not going to have the support of the US military either way, and the US staying in NATO could prevent the organization from taking any action at all, it may be in the best interest of Europe for the US to leave NATO so they can’t cripple it from within.
I feel like a more realistic timeline for that is 2027 at the very latest