A few people seem to have survived the mauling and reinvented themselves as 'national treasures' - Michael Portillo for one with (over a much longer period) maybe John Profumo. Others have tried but fallen flat (presumably on the basis that leopards can't change often their spots) viz. Edwina Curry and Ann Widdicombe.
It is a bit of a slippery slope to let loose the dogs of press war on every unpleasant individual in a position of authority though. They not only have to be unpleasant but do something that provokes the public's ire, with hypocrisy right up there at the head of the list. As the principle goes: 'be pleasant to people you meet on the way up as you'll meet them again on the way down'. That does seem to be something that's missing from DC's skillset so it's maybe not surprising that there's an element of schadenfreude in all this. 'Trample on me once, shame on me, trample on me twice, shame on you'.