I would also have concerns of if congress only requires 50% of the vote or not, but as things stand, we at least have enough who support NATO and view Russia as an adversary, that it is unlikely.
But house republicans have proven over and over they are weak. They cave to pressure on Trump when he isn't even president.
To use one of Trumps phrases, Republicans got a 'sweetheart deal' on immigration and the border, and they gave it up over pressure from Trump to not fix the border issue if he isn't in office. Every day the border crisis continues is on Trump, and republicans hands (I want to say house, but even the Senate caved to him).