A high-stakes meeting at the White House on Wednesday is set to bring long-simmering transatlantic tensions to a head, as U.S. President Donald Trump confirmed he will open discussions about the possibility of a United States withdrawal from the North Atlantic Treaty Organization during talks with NATO Secretary-General Mark Rutte. The encounter comes just 24 hours after the U.S. and Iran reached a last-minute two-week ceasefire agreement that averted an all-out American military strike, and it unfolds against a backdrop of deep anger from the Trump administration over what it calls a betrayal by Western NATO allies.