Can voters believe that all their votes will be counted?

Donald Trump is already raising questions about the outcome of the November election, telling supporters, "I'm afraid the election is going to be rigged. I have to be honest." While experts discount Trump's claims about "voter fraud," they concede that electronic voting is vulnerable to hacking. One advisor predicts a political "bloodbath" if Trump should lose, while the Clinton campaign calls him "a reflexive conspiracy theorist." Will the dispute lead voters to lose faith in the integrity of the electoral system? Is that the real threat to democracy in America?