President-elect Donald Trump has not yet re-entered the White House, but the U.K. and neighboring European Union are already working closer together to protect themselves against potential trade and defense confrontations with the incoming U.S. leader. U.K. Chancellor Rachel Reeves travelled to Brussels on Monday to convene with her EU counterparts in the first such encounter since Britain left the European Union in 2020. Her host, Eurogroup President Paschal Donohoe, said he hoped...