After days of coyly raising questions about Ted Cruz's eligibility to be president, given that he was born in Canada to an American mother and a Cuban father, Donald Trump let his audience weigh in at a rally Sunday afternoon. "Is he a natural-born citizen?" the Republican White House hopeful asked several thousand gathered in a Reno ballroom. Members of the crowd shouted back, "No!" "I don't know," Trump said. "Honestly, we don't know. Who the hell knows." Cruz was Trump's No. 1 target during the 65-minute event, revealing just how much of a threat the Republican senator from Texas...