jimthedog writes that you Democrats can't impeach him for not holding office, because that would basically be admitting that he does.

This basically creates the circular reasoning similar to the Protagoras v. Euathlus case mentioned elsewhere. Incidently, it is certainly one of my favorite legal and logical paradoxes.

http://www.earlham.edu/~peters/writing/psa/sec20.htm#A

Edit: I found, at that same site, an actual case where this Liar's Paradox played out in the courtroom (albeit 1946): http://www.earlham.edu/~peters/writing/psa/sec20.htm#B