The Rabbi, I think your reference to "nattering nabobs of negativism" may be lost on at least a few THR members. Unfortunately, it's not on those my age.
Bush 41 had just one term, although he ran on VP credentials. A minor point maybe, or maybe not. Likewise Gerald Ford. Same situation with Johnson. So, we have to go back to the 1950's to find a presidential candidate who ran on his own and served two terms. From then, we have Nixon, Reagan and Clinton. On the flip side we have Johnson, Ford, Carter, and Bush 41. Looks to me like the conventional wisdom on incumbents is equally split.
Kerry is floating the idea of delaying the nomination so as to be unencumbered by campaign finance rules that he voted for, and Bush signed. It's an unusual move, but this is the first time that candidates have had to abide by unconstitutional constraints on fund-raising. If Kerry took the nomination in July, he'd lose 25-50 million in contributions. Too bad our legiscritters on both sides didn't see this coming.
And I believe you underestimate the power of the President to rally the public--and thus pressure opposition party members--to vote for anti-gun bills. Clinton did so masterfully. The only reason we haven't see any anti-gun legislation out of GW is that he: a) is really pro-2A; or b) he doesn't see the need to enrage his base. I think it's a combination of the two.
Kerry, on the other hand, is still indebted to his own base, which includes the usual suspects. Especially Ted Kennedy, who has been stumping harder for Kerry than any other Dem. All it's going to take is for there to be one school shooting, or one McDonald's shooting, and Kerry will have a massive press conference, with a Clintonesque phalanx of the usual PD brass behind him. And the public will buy it.
Since Bush took office, there have been some large-scale shootings. His response has been to blame the lack of character of the shooter, the lack of moral leadership, the need for this or that or the other. You may not like it, but you'll notice he hasn't blamed the gun.
Kerry will be just as hard on guns as Clinton--maybe worse. He, like Clinton, will go out and shoot a duck to claim his firearms heritage. Sarah Brady, Chuck Schumer and the rest may have to hold their noses, but they will get what they want from him. If this election is as close as it appears to be right now, Kerry will be beholden to every left-wing group that kept silent during the campaign. And, once elected, Kerry will be required to deliver.
The same can be said about GW, except that he isn't beholden to the anti's. The only anti-gun message that GW has delivered is that he would sign the AW ban renewal if it reached his desk. Back in 2001, GW took Tom DeLay aside and told him "Tom, you don't have to worry about a thing."
Draw your own conclusions.