All realistic deals on the table that Iran might agree to look an awful lot like the deal Obama got without the costs and risks of war. Trump is reluctant to agree to such a deal because it will essentially be an admission that Obama and Kerry were right all along–this was the best deal possible and better than no deal or war.
Reporting was that Trump could have gotten such a deal before the war began, but Trump rejected it because he thought he was a great deal-maker who could do better than Obama. He was wrong, and we got war because of it.
Germany is starting to massively increase its military power. Europe needs German power. Once Germany has this power, some Germans will want to use it in ways that are not in America’s interest. We need Germany to pull its own weight, but we need to keep that weight on our side, and to do this, requires keeping America’s commitment to Europe strong and clear. German power is much less dangerous when embedded in a NATO structure that includes the United States.