Probably close to 10 Million people have voted already, and there's literally just two weeks left. The time to change this race for Trump was weeks, if not months ago.
Nope. In Austria 15% of people voted early and they broke 65-35% for the center-left candidate. The far-right candidate still kept the race close though in the end, losing just 49.7 to 50.3
Much will also depend on the election day vote in many states ...
75% of Arizona votes before Election Day. If Clinton has a 5-6 point lead going into Election Day she is likely to win AZ