... Tried reseating the breaker and no luck, just arcing every time I pushed on it. ...
Yeah, well, don't push on the breaker when it's
on. That's not going to help things. Al gave a pretty good explanation of why.
I learned about this sort of problem a long time ago working with a damaged theatrical dimmer set. The theatrical lights were connected to the dimmers with 3-pin 'stage pin' connectors. Well at some point probably just one of these connections had some arcing. Problem is, they re-patch the connectors for every show with a different lighting design. So the arc-damaged pins on that connector presumably had a bad connection to the socket on the next dimmer they were plugged into, causing more arcing. The problem spreads like a sexually transmitted disease; bad pins get plugged into sockets, which cases small arcing damage to the sockets. The next pins plugged into that socket get damaged, and so on.
Someone had tried fixing the problem by filing the blackened metal off the pins, but this just made the problems worse with un-even surfaces.
Same thing goes for ordinary Edison plugs and outlets. If you have an arc damaged cord pin, stop using the cord. If you have an arcing breaker, replace it, and don't move it to another spot on the busbar.