Personally, I'm all for them, at least when it comes to anybody who wants to be our President or Vice President.
Obama has been all high-minded about the evils of negative campaigning for the last 18 months (out of the purity of the Chicago politician's heart, no doubt, rather than out of any instinct for self-preservation). But as soon as the GOP finally comes up with somebody with comparable charisma, Democrats went into a feeding frenzy of scandal-mongering.
As well they should. A vice president could become president.
Of course, the president is president, so one might think that presidential candidates would be exposed to similar scrutiny, but it doesn't seem to work that way.