Just to clarify some things:Why wasn't he being diplomatic then? Because he has financial interests in Russia, that's why. And those same financial interests coupled with his love of dictatorships and especially Putin (he openly admits he want's to make himself president for life just like his buddy Vlad recently did) will cause him to throw Nato right under the bus.
1. Trump has financial interests in Russia? Please specify instead of making vague allegations.
2. "...His love of dictatorships..."?? Where did you get that? Any factual basis at all?
3. Specifically when did Trump seriously declare that he wanted to make himself president for life? How would he have accomplished that under our system of democracy?
I realize this may be going down an insignificant rabbit hole that's totally unrelated to the OP, but I get tired of this type of Trump slander still being spewed from Trump-hating liberals everywhere including the mainstream media. Donald Trump isn't POTUS any more, and it's highly unlikely he'll run for office again. It might be more productive to focus on the actions of the current resident of the Oval Office.