If China moved to Mexico, we would not invade Mexico, kill thousands of Mexican citizens, try to claim Baja California, and find ourselves kicked out of the G7. I say all this under the pretext that Trump isn't president.
Of course, China wouldn't move into Mexico because they have historically been our ally. Of course, they used to be until the last few weeks. Cuba may be a better example.
There is a difference between deciding whether or not to enter a fight versus entering a fight and then suddenly deciding to bail early, give every single one of our allies the proverbial middle finger, and then suck up to a lying, dictator who has consistently broken promises and has relentlessly both criticized and cyber attacked our country.
And we aren't negotiating with Ukraine. We are attempting to strongarm them. Regardless, kissing Putin's ass while we are doing it is embarrassing and unbecoming. So yeah, it does feel like Trump is fixated with Putin.