President Trump is once again threatening to seize Kharg Island, Iran's main oil export hub and a high-value target in the months-long war. The big picture: Attacks on the small island's oil infrastructure — or a full-blown takeover — could choke Iran's revenue, but there's no guarantee the stark escalation would persuade Iran to accept Trump's terms. Driving the news: Trump wrote in a Thursday morning Truth Social post that "[a]t some point in the not too distant future, we will be taking Kh