Republicans really do believe the stupid things they say. They have convinced themselves, against all evidence, that election fraud is both rampant and easy. Some of them then get it in their heads to try it for themselves; after all, what's good for the goose is good for the gander. Might as well do some fraud for their side to even things out.

Then they find out the reality that our electoral system has been refined over centuries to be quite robust and secure. And catch felonies in the course of doing easily discoverable fraud.