Exactly why he should pack it in. A good guy, his heart's in the right place on nearly every policy he espouses, but he'll be viewed as this year's "Perot". He'll be finished for good.
On another thread, someone compared some of these anti-Arnold comments with 5 year old kids playing a board game, and when they didn't like the rules or the way the outcome was shaping up, they would just knock over all of the game pieces.
Very analogous to what's happening here. If they can't have McClintock, they'll go for Bustamante. Amazing. The "Circular Firing Line" always amazes me.