The three Baltic states and Poland might disagree.
Oh I’m sure they would. They’d love it to be America’s problem. I didn’t see many of them fighting the wars in the middle east with us. If they sent anyone it was a token force not in the thick of it.
Oh good, let them deal with it
Poland is the wildcard.
I don’t think they’ll sit idly by if Russia invades Ukraine. They may unilaterally move their troops into Western Ukraine. Remember, parts of Western Ukraine were once part of Poland, and Poland will want to establish a buffer, that’s what could drag NATO into it.