RICHMOND, Va. (AP) — Donald Trump dominated Virginia's coal country in the March GOP primary, but Texas Sen. Ted Cruz's strength with party insiders may win him the support of the area's delegates to the Republican National Convention. Trump's campaign is set to face a crucial first test of its organizational strength in Virginia when state Republicans begin electing delegates Saturday. Those delegates could ultimately help decide who becomes the Republican presidential nominee at a contested national convention. A few hundred Republicans are set to gather in Wytheville, a town of 8,000 in the state's southwest corner....