Mitch McConnell is “increasingly optimistic that there actually may be a second ballot" at the Republican National Convention in Cleveland this summer, the Senate majority leader told a Kentucky ABC affiliate over the weekend.If no presidential candidate is able to secure a majority on the first ballot in Cleveland, delegates will vote again — and more delegates became unbound and thus able to vote freely with every subsequent ballot.That could be bad news for Donald Trump, who has struggled in state after state to secure delegates' loyalties on a hypothetical second ballot.