"If I live to be 100, I don't think I will ever see such a promising congressional candidate screw up so badly on such a simple task."
Nobody remembers this now, but in 1994, Indiana state Auditor Ann Devore was a strong candidate for Congress. But she forgot to turn in the proper paperwork, even though her own office was in the same hallway as the Secretary of State's office.
But this comes very close.
I see Devore ran in the 2nd, that was a pretty brutal GOP primary they had in '94, David McIntosh barely emerging as the victor by 1%.