I mean, 43% of registered voters didn't vote in 2012. A significant number of these people didn't vote because they believe the system is rigged against them. Their vote won't matter. Trump turned them into Republican voters. This is why the "polls of likely voters" were so fucking off. A bunch of unlikely voters were suddenly motivated to vote. Without them, the GOP fades away as demographics change.
He's talking to them again, and its why all of this legal jeopardy helps Trump. The last election was rigged. Your vote was stolen. They are trying to rig this one. They are trying to keep you from being able to vote for me, your champion, ever again. They are trying to hold you down, again. To put you back in your place in the bottom of the fucking American shit heap.
This is the important thing to understand: He is taking the basket of deplorables' perceived victimization at the hands of the educated, successful and prosperous societal elite and attaching it to himself. He is saying that he is being victimized just like they are. Persecuted. Oppressed. Held back through no fault of his own. But, he's giving them a way to feel like they are doing something about that victimization. Get out and vote. Help me and you are helping yourself. You aren't deplorable. Your life has been made deplorable by "them". Vote for me, and you are doing something important against "them", and with "them" gone, your life will be what it should be.
The truly sad thing is that all the energy and resources they put into their support of Trump is just completely wasted. Even (especially?) if Trump wins, their life does not improve. They will still be in the double wide struggling to make ends meet, falling further and further behind against inflation. I'm not saying their support should be redirected to Biden, either. Just fucking use that energy and those resources towards education, or training, or anything else not criminal and their life has a chance to improve more than it does with personality X moving into the White House.
The easiest way to expose Trump as a fraud would be to give these people real help in the form of government policy and investments. Trump's self-portrayal as their benefactor can only stand up in a vacuum of empathy and beneficence from the rest of society.