CASPER, Wyo. — On Saturday morning, while his two rivals for the Republican nomination stay back east, Sen. Ted Cruz, R-Texas, will fly to this city to address the state GOP convention. The potential prize: Fourteen delegates to the national convention in Cleveland. The competition: Hard to find. On Friday, with no explanation to either party officials or media, Donald Trump's campaign announced that Sarah Palin would cancel her scheduled speech here. Additionally, while Republicans gathered for a barbecue and fried chicken dinner, the campaign of Gov. John Kasich, R-Ohio, was invisible, and the Trump campaign was clearly outmatched. The...