The United States’ ambassador to Libya warned rival actors Wednesday against using the country’s oil wealth as a political “weapon,” amid an internal blockade that has slashed output since April. “The United States continues to support the vast majority of Libyans who expect elections and demand that the country’s oil wealth be managed responsibly,” ambassador Richard Norland said, according to an embassy statement. Normally based in neighbouring Tunisia due to Libya’s delicate security situation, Norland spoke in Tripoli during the first overnight visit by an American ambassador in years. Lib…