Trump begins his second term noisily, and ahead of time, focusing his political communication on social media.
He uses a strategy of breaking the rules, humiliating those he wants to harm before entering advantageous negotiations.
He treats four US allies like vassals with controversial proposals.
Trump disregards the commitments made in international institutions and decorum in diplomatic relations.
The guarantees he might offer in negotiations are in doubt.
Putin seems to be the only one benefitted by his attitudes.
Europeans should avoid negotiating with Trump individually and should preserve unity.
Conclusion: Faced with Trump's aggressive and imperialist attitude, the only effective response is unity and adherence to international law and established institutions.