U.K. Prime Minister Keir Starmer is staring down a geopolitical tightrope ahead of his meeting with President Donald Trump on Thursday as he looks to stay strong on support for Ukraine, as well as maintaining relations with the U.S. — London’s chief ally. But the tense international atmosphere is not the only hurdle Starmer is facing following his waning approval ratings at home. The U.K. saw a massive political shake-up in July 2024 after voters...