>>He visited the Harrisburg area and the Philly suburbs, multiple times.

Right. Current consensus is that the rustbelt/blue wall states were treated as "in the bag" by the DNC who neglected them as Trump wooed them extensively.

But here's debate cheat Donna Brazile's explanation: starts out wise enough, quickly turns bad: apparently Russian hackers caused the DNC to neglect the rustbelt.

Here's an exercise: when you see attribution of fault by either party, watch for the merging of unrelated issues to concoct vicarious grievance.

You know, I’m not going to sugarcoat what happened on Election Day. We, the Democratic Party has a lot of things that we have to do. Donald Trump cracked the blue wall, OK? He cracked the blue wall. We had a blue wall. We should’ve maintained it. We should’ve kept it. There’s no question that having a foreign adversary, a foe, interfere and to use hacked stolen emails and weaponize them against the Democrats, not the Republicans, not Trump, but against Hillary Clinton and the Democratic Party, the president’s party, we should be outraged by it. I know I’m still outraged by it. But I want to make sure that this never happens again, because this country deserves to have the kind of cyber security experts involved to make sure that our homeland is protected at every stage.