The Obama administration on Friday banned offshore drilling in the Arctic, setting a likely collision course with President-elect Donald Trump, who has vowed to “unleash” new energy production in the United States by rolling back restrictions on oil and gas companies. The move by the Interior Department, part of a new five-year plan for energy development in federal waters, would put a temporary end to exploration in the Chukchi and Beaufort Seas off the Alaskan coast. It also dropped plans to allow companies to drill for oil and natural gas in the Atlantic Ocean off of four southeastern states, including Virginia.