President Donald Trump on Thursday threatened to seize Iran's main oil export hub, Kharg Island, and assume "total control" of the country's oil and gas markets, drawing a direct line to the U.S. operation in Venezuela as a template for what could come next in Iran. "At some point in the not too distant future, we will be taking Kharg Island, and other oil infrastructure points," Trump wrote on Truth Social, adding that the move would mirror what Washington "has with Venezuela, which is working out brilliantly for both Venezuela and the United…