The secret of Bachmann's success is that every time you laugh at her, she gets stronger. In modern American politics, being the right kind of ignorant and entertainingly crazy is like having a big right hand in boxing; you've always got a puncher's chance.
Traditionally (and what is conservatism if not respect for tradition?) conservatives have railed against "Constitutional tinkering," while progressives have proposed all manner of amendments—some successful (women's suffrage), others not (equal rights for women), still others, well, a bit unserious (a ban on "war for any purpose").
For a party (whether of the Tea or Grand Old variety) that sees the Constitution as something so perfect as to have been divinely inspired, the idea that it needs to be altered fundamentally is beyond crediting, something like putting the Fifth Commandment up to a popular referendum.
But the Tea Party vision of the Constitution has never been one of fidelity to the document itself, or even to the Framers. Instead, it's a devotion to those scraps and snippets of the Constitution they accept, an embrace of only the Framers they admire, and an eagerness to jettison anything that conflicts with or complicates that vision, including the rest of the Constitution.
Here, then, if you needed it, is another indication that the Republican Party—in an act of grand, ongoing, unconscious irony—is assigning true conservatism to the ash heap of history and replacing it with a brand of radicalism in which nothing, not even the Constitution, is sacrosanct.