Republicans held onto control of the Wisconsin Senate on Tuesday night, beating four Democratic challengers in a recall election viewed as a referendum on Republican policies in that state and beyond. The Associated Press declared Republican Sens. Alberta Darling of River Hills, Robert Cowles of Allouez, Sheila Harsdorf of River Falls and Luther Olsen of Ripon winners. The AP also declared Democratic challengers Jennifer Shilling of LaCrosse and Jessica King of Oshkosh victors.