DETROIT (Reuters) -United Auto Workers leaders approved a tentative deal Sunday with Ford that includes a pay hike of at least 30% for full-time workers and could more than double pay for others in a victory for the union's fight to roll back 15 years of concessions. Bargaining continued at General Motors without any deal. UAW President Shawn Fain on Saturday ordered a walkout at GM's Spring Hill, Tennessee, engine and assembly plant.