seems a pretty odd reason to destabilize an enormously successful alliance; it seems incredibly short-sighted and even isolationist not to understand that it is in America's geo-political and economic interests to be part of a strong grouping that encompasses so many countries across two continents.
Germany and many other euro nations have become accustomed to the US providing the heavy lifting for NATO. It’s been grinding on a number of US administrations that the burden for Europe’s defenses has fallen on US taxpayers so don’t make this a Trump thing, it was an Obama thing and a Bush thing prior as well.
It’s time for that to change. Europe should lead the defense from a threat from a fellow European nation, not the US.