A major split among senior White House officials over whether to effectively create a new tax on imported goods has stalled the broader tax overhaul effort on Capitol Hill, with Republicans looking to the Trump administration for leadership on an issue that has drawn fierce resistance, according to several officials with direct knowledge of the matter. White House chief strategist Stephen K. Bannon, senior adviser Stephen Miller and National Trade Council director Peter Navarro have all voiced internal support for the creation of a border adjustment tax or something like it.