About 3/4 sarcasm.
For the other quarter, I'm saying that Debbie and the DNC are so dirty, and do reprehensible stuff so routinely, that they can't keep track.
If I (or you, I assume) committed some unusual act of corruption or self-dealing, it would be fairly rare, and the details would be uppermost in my (our) minds. But these guys do so much perverse crap for the party, or for themselves, that it seems plausible to me that they lose track of the details. My comment is along the lines of Shakespeare's "what a tangled web we weave/when first we practice to deceive."
Agree.