washington, April 8 -- As President Donald Trump muses about seizing control of Iran's oil sector, one potential upside is looming in his thinking: expanding US global energy dominance to gain trade leverage against China, people familiar with the matter say. Trump repeatedly discussed the prospect on Monday, casting it as a boon for the US even as he acknowledged the political risks of further entangling the US in the Middle East. "If I had my choice, what would I like to do? Take the oil, because it's there for the taking. There's not a thing they can do about it," Trump told reporters at the White House. "Unfortunately, the American people would like to see us come home. If it were up to me, I'd take the oil, I'd keep the oil. I would ma...