David Harsanyi discusses the (limited) mechanisms the US constitution put in place to prevent the whims of temporary majorities being imposed on the country:
To begin with, whether Democrats like it or not, this issue concerns the Constitution — where stuff was written down for a reason. That’s not to say that expanding background checks or banning “assault rifles” would be unconstitutional (though you may believe they both should be). It’s to say that when you begin meddling with protections explicitly laid out in the founding document, a 60-vote threshold that slows down stampeding legislators is the least we deserve.
The Founding Fathers worried that “some common impulse of passion” might lead many to subvert the rights of the few. It’s a rational fear, one that is played out endlessly. Obama, who understands how to utilize public passion better than most, flew some of the Newtown families to Washington for a rally, imploring Americans to put “politics” aside and stop engaging in “political stunts.”
[. . .]
I’m not operating under the delusion that any of this is good national politics for Republicans — though the arguments about obstructionism’s dooming the GOP are probably overblown. No doubt, when the next disaster hits — and it will — Democrats will blame the overlords at the National Rifle Association and Republicans for the act of a madman. That’s life.
But generally speaking, it’d be nice if Congress occasionally challenged the vagaries of American majority “instinct.” Though it might seem antithetical to their very existence, politicians should be less susceptible to the temporary whims, ideological currents and fears of the majority. Theoretically, at least, elected officials’ first concern is the Constitution. And if the need for gun control is predicated chiefly on the polls taken immediately after a traumatic national event, they have a perfectly reasonable justification to slow things down. In fact, if Washington internalizes the 60-vote threshold as a matter of routine, voters should be grateful. Considering Washington’s propensity to politicize everything and its increasingly centralized power (what your health care looks like is now up for national referendums, for instance), this might be the only way left to diffuse democracy.
