The message received in Europe is clear: post-midterms Trump is on the offensive, picking up his old grudges and shifting to a new, more aggressive posture. Whether this new hostility will be confronted by European leaders gathering in Paris, who have watched Trump's downward drift from the democratic principles they hold sacrosanct, is unclear. World leaders have learned to adjust their measure of Trump. The midterm results indicate their recalibration is far from done.