The vice-president has endured his most humiliating – and damaging – week as his boss’s fall guy. How much more can Maga’s great hope take? For a would-be president, JD Vance has an unfortunate habit of getting into fights he cannot win. Three losing battles in the past week – with Iranian negotiators, Hungarian voters and Pope Leo – brought censure, humiliation and mockery raining down on his head. None were of Vance’s choosing. All were fought vicariously on Donald Trump’s behalf.The vice-president is paying a high price for sycophantic loyalty to his boss. His poll ratings are plunging. His Maga succession hopes falter. He suffers by association – although his own inflammatory statements and misjudgments often make matters worse. Yet amid growing doubts about Trump’s mental health and fitness to govern, Vance remains the White House’s next-in-line.Simon Tisdall is a Guardian foreign affairs commentator Continue reading…