Personally I think the Hillary campaign and her liberal media enablers are overdoing it with the “Hillary has the race in the bag. It’s over. narrative.” There is virtually no enthusiasm on her side as it is, if the democrat base thinks the race is over, they may just not bother voting like they would if they thought the race was a tie. However every Trump supporters I know is marking the days on the calendar like counting down until Christmas for a chance to cast a vote for Trump (and against Hillary) and the polls mean nothing to them.
The "it's in the bag narrative" will backfire because it serves to keep unenthusiastic Dem votes home. The Donald camp will not be discouraged by the Gestapo's propaganda. We will come out and vote in force and with God's grace - win!