The White House is weighing measures to increase U.S. oil output as supply disruptions tied to the Iran war continue to tighten the market. “We’ve been in constant communication with the oil companies, and have been considering measures that we could take here in the U.S. to increase U.S. production really soon,” White House economic adviser Kevin Hassett said Thursday. “There are things, regulations that are holding up, like how quickly stuff could come through … and we’re studying those, how we can change…