Growing U.S. oil export debate has now spread to geopolitics

By Valerie Volcovici WASHINGTON (Reuters) - Lifting the longstanding ban on U.S. crude oil exports would boost the country's economy and enhance its global leadership, a former senior Obama administration official will tell senators on Thursday, introducing a strategic dimension to the growing debate over selling American oil abroad. In testimony submitted ahead of a Senate energy committee hearing on U.S. crude export policy, the Pentagon's former undersecretary of defense for policy,