GOP presidential candidate Ted Cruz established himself on Saturday night as the challenger with the best chance to take down Donald Trump, as the Texas senator posted two impressive victories and nearly caught the front-runner in two other states. Cruz won the caucuses in Kansas and Maine in a runaway. Trump edged him at the caucuses in Kentucky and the primary in Louisiana. “To see strong wins across the board is very encouraging,” Cruz said. “And I think what it represents is Republicans coalescing, saying it would be a disaster for Donald Trump to be our nominee and we’re going...