It wasn’t the kiss, it’s just plain old tribal politics.
Bush had already sewn up the Republican tribal base, but Gore had spotlight hogging Clinton and the distraction of Hillary’s campaign to deal with. It wasn’t until the convention that he was able to rally the Democrat tribe members. Now he has. Who would the Democrats vote for? Bush - nah, they prefer Gore. Who would the Republicans vote for? Gore? Are you nuts? So both flocks have come home to roost under their party’s umbrella - Bush simply had his come in earlier, Gore later.
For the Bush side, they had already anticipated an extremely close race, I heard some Bush operative on one of those talk shows say it would be as close or closer than the Nixon Kennedy race. This was before their convention. So this gain of Gore’s is no surprize, but sure as hell a disappointment. And Bush faces what is basically a hostile press.
For the Gore side, they have done an excellent job of appealing to the party faithful - maybe even better than Clinton, who “triangulated” and alienated the more liberal side. He has shown himself to be far more energetic
and a better campaigner than was anticipated. He came back from a deficit that was simply unimaginable for an incumbant in good economic times. Now wonder he looks smiling and happy all the time.
Gore’s bounce is good, but it does not necessarily mean momentum. He went ahead, slipped back some, and stopped. They both appear to be stalled at the same point. Gore is great among women, Bush does better among the men.
Two good polls to look at are the Portrait of America, and the Voter.com Battleground polls. Zogby has an excellent reputation as well. Look also for the state by state electoral college count, most polls still give Bush an advantage. It’s the electoral college vote that decides the Presidency. It is interesting to note (I forgot which poll) that the women’s vote has switched no less than four times: first it was Bush, than Gore, than Bush, and now back to Gore. Women! They might change back. Maybe Bush should kiss Tipper himself!
Another thing about polls: they vary so much that it is fun to watch. Depending on who asks for it (and pays for it), they may poll likely voters,(tend to skew Republican), registered voters (tend to skew Democrat), and general public (Democrat again). The day of the week can change it as well - weekends are good for the Democrats, weekdays for Republicans. Of course, sometimes pollsters mix up all of the above in a poll. The people commissioning the polls know this as well, so they can steer it to their advantage. Look at the wording of the questions - you can sometimes see a bias come through. Ever hear of “push” polls? And pollsters can have their own agenda as well.
Reading through the replies above, I see an awful lot of tribal loyalty and antagonism showing. That kind of thinking is why both sides have now solidified their bases. It is the Independents who will decide this.