2 ignition switches and still no run

FWIW, I'm having a similar intermittent problem with an aftermarket switch: Will crank and start but as soon as you release the key to the run position it dies. Even had it die once while driving down the street. Seems to be at the column connector. I can unplug the connector, rejoin it, and then it starts and runs fine. I recently noticed the blue wire/terminal at the connector is getting too hot to the touch after it's been running for awhile. There's obviously a poor connection at the terminal. Very frustrating.