The D Brief: Competing views on Iran; $151B spending plan; 44th boat strike; B-21 production deal; And a bit more.

A war against Iran could be a prolonged and damaging conflict with  numerous U.S. casualties, Joint Chiefs Chairman Air Force Gen. Dan Caine has told President Trump and his National Security Council in recent days, according to Monday reports by Axios and the New York Times.Trump had a different story, posting on Monday afternoon that “if a decision is made on going against Iran at a Military level, it is [Caine’s] opinion that it will be something easily won.” The presid