President Donald Trump’s travel ban faced its toughest test yet Tuesday as a panel of appeals court judges hammered away at the administration’s claim that the ban was motivated by terrorism fears while also directing pointed questions to an attorney challenging the executive order on grounds that it unconstitutionally targeted Muslims. The contentious hearing before three judges on the San Francisco-based 9th Circuit Court of Appeals focused narrowly on whether a restraining order issued by a lower court should remain in effect while a challenge to the ban proceeds.