by Michael Mathes WASHINGTON , United States (AFP) — Donald Trump is aiming for a thumping victory Tuesday in Indiana to squelch lingering doubts about his viability as the Republican presidential nominee and pivot toward presumptive Democratic standard-bearer Hillary Clinton. The “stop Trump” movement faces a moment of truth in the Midwestern state, as the campaign of chief challenger Ted Cruz struggles to win over voters ahead of its potentially decisive primary. Polls open at […]