If we live in a time of zombie politics, it's only natural that we are exposed to zombie politicians.
Disgraced politicians never die. They're like Jason from the "Friday the 13th" movies -- you just can't kill them. They keep coming at you like the political version of zombies.
To be fair,
a) We should expect most politicians to be zombies of one sort of another.
b) Obeidallah is referring to serial killer/monsters.
(thanks to Todd Bryant)