Some of these shifts in opinion may be responses to events that liberal elites have not deigned to notice. Forty of the 50 states now have concealed weapons laws that allow law-abiding citizens to get permits to carry guns. Gun controllers predicted these would result in traffic shootouts and general mayhem. They haven't. It turns out that criminals are deterred from attacks less by gun-control laws than by the possibility that their intended victims may be armed. As for global warming, many Americans may have noticed that temperatures actually haven't been rising over the past decade, as global warming alarmists predicted. The elites are able to hire armed security guards and jet off on private jets, so they are less likely to notice these things.

I think there's something else at work here. For liberal elites, belief in gun control and global warming has taken on the character of religious faith. We have sinned (by hoarding guns or driving SUVs); we must atone (by turning in our guns or recycling); we must repent (by supporting gun control or cap and trade schemes). You may notice that the "we" in question is usually the great mass of ordinary American citizens.

The liberal elite is less interested in giving up its luxuries (Al Gore purchases carbon offsets to compensate for his huge mansion and private jet travel) than in changing the lifestyle of the masses, who selfishly insist on living in suburbs and keeping guns for recreation or protection. Ordinary Americans are seen not as responsible fellow citizens building stable communities but as greedy masses, who must be disciplined to live according to the elite's religious dogmas.

It should not be completely surprising that over time, these views have become less congenial to the masses, who are the object of such condescension. Democratic officeholders, who must live by the discipline of the ballot, have noticed. Party leaders did not press to re-enact the assault weapons ban when it expired and currently are flummoxed by the backbenchers who are resisting a cap and trade bill that would impose huge costs on those who use electricity. Elites may lead, but Americans do not always follow.