By Andrew Gray and Lili Bayer BRUSSELS, May 4 (Reuters) – European officials have been working on ways to convince Donald Trump ⁠to ⁠keep the United States in NATO despite severe tensions over the ⁠Iran war. But his abrupt move to cut U.S. forces in Germany is the latest sign that such efforts have their limits and are far ​from certain to succeed. The substance of the decision announced on Friday to remove 5,000 troops from Germany did not come as a surprise to NATO officials. European leaders have agreed with the U.S. president that Europeans will take over more responsibility ‌for their own security from U.S. forces. Dropping a plan to ‌deploy long-range U.S. Tomahawk missiles to Germany was more concerning for Berlin. But even that was not a huge shock, as that deal was made by Trump’s predecessor, Joe Biden, and U.S. Tomahawk stocks have been depleted by the ⁠U.S.-Israeli war against Iran. More ⁠alarming for European governments was how the move was made – with little prior notification or consultation and with …