Biden was, but he doesn't remember how to take a shit by himself anymore.
Which is why I think even though Putin does remember, he's banking on American indecision & lack of meaningful reaction because there's a bunch of empty suits sitting at the helm. Which would honestly be for the best, in terms of overall life saved; sucks for Ukraine, but it's probably time to make nice with your cousins & forget about NATO & the EU.
And in any case, we won't be able to ship weapons to a Ukrainian insurgency, and neither will any of our proxies; so we won't be able to pull off anything like Syria or Libya.