In an ARD interview in Berlin, the German chancellor said partnership means respecting differences after Trump insulted him, threatened to withdraw US troops from Germany and warned of higher EU auto tariffs.
Merz had criticised US military action in Iran last week, prompting Trump's social media attack, but said he still believed the president respected differing views, "perhaps a bit less" for now.
Earlier on Sunday, reports said the Pentagon would cut 5,000 troops from Germany and halt planned Tomahawk missile deployment, deepening strains over Iran, European security and trade.
Is the US troop reduction a strategic pivot or the end of America's unconditional security guarantee for Europe?
As Germany rearms to become Europe's backbone, can it fill the security void left by departing US forces?
Can Germany's economy sustain its military buildup while facing new US trade tariffs and leading Europe's defense?