It’s something Trump can use to reduce our support or to leave NATO when they don’t follow through.
For the first time in roughly 25 years, a Reforger-exercise will occur in Germany in 2020. It’s mostly a US exercise, with a fair amount of German participation, and lesser participation by the other NATO countries.
I don’t expect this to go well. Between maintenance issues with German vehicles/aircraft and major anti-NATO/anti-US protests throughout northern Germany....it’ll turn into a joke by the end of the exercise. That’s likely to be the point where Trump lays out the events after he wins the 2020 election, and downsizes the US commitment to NATO.