I think she will never be a viable presidential candidate. She will never have enough positive polling to win nationally, though she will probably try in 2008, when she thinks she has a better chance of regaining a democratic White House. Unfortunately, I fear the most likely future is that she will be yet another incarnate of the likes of Jesse Jackson, and plague us with sickening media coverage for decades to come.
Don't be so sure. While of course GWB has the great advantage, we must remember that millions of votes exist in this country among the depressed, angry, immoral, and insane that are Hillary's for the taking. I am only slightly kidding.
Hillary is bad on the stump, cold in public, clumsy in her political tactics, and arrogant with the press. But you can never count her out for one main reason: her unstoppable will to attain power by any means necessary. There is literally nothing she won't do, no line she won't cross, no law she won't break. And the press will tolerate her and pump her candidacy. For those reasons I believe Hillary will be a serious contender when she runs.