When Sally Yates was up for Senate confirmation as Deputy Attorney General, Senator Jeff Sessions asked her whether she would oppose the President if he proposed something illegal and was very pleased when she said yes. Obviously he and his fellow Republicans felt that it was great to have a 
deputy Attorney General who would be willing to oppose President Obama but now feel that it is almost treason for her to oppose President Trump when she felt that his actions were illegal. If Sessions indicates a willingness to support Trump's ban, the Democrats should oppose his nomination as Attorney General, challenging the several Republican Senators who oppose the ban to join them or else abandon their principles.