Former Republican presidential nominee Mitt Romney blasted Donald Trump on Wednesday after his successor hinted that it is unlikely he will release his tax returns before the November election. "It is disqualifying for a modern-day presidential nominee to refuse to release tax returns to the voters, especially one who has not been subject to public scrutiny in either military or public service," Romney wrote in Facebook post. "There is only one logical explanation for Mr. Trump's refusal to release his returns," he wrote Wednesday. "There is a bombshell in them. Given Mr. Trump's equanimity with other flaws in his history,...