In case anyone doubts Senator John McCain's proclivity for callous narcissism and his campaign's inclination toward vicious hackery, I refer you to the statement, via HuffPo, of Kathy Hilton, mother of the McCain-dissed Paris Hilton.

I've been asked again and again for my response to the now infamous McCain celebrity ad. I actually have three responses. It is a complete waste of the money John McCain's contributors have donated to his campaign. It is a complete waste of the country's time and attention at the very moment when millions of people are losing their homes and their jobs. And it is a completely frivolous way to choose the next President of the United States.

And in case you wisely tuned out the buzz surrounding the McCain ad that prompted the response, McCain said he was 'proud' of the ad, which trashed two fellow Republicans in a silly, ineffectual attempt to diminish the gravitas of Senator Obama by unconvincingly associating him with two 'Hollywood train wrecks.' "All I can say is we’re proud of that commercial," the GOP nominee-apparent told a town hall meeting.

Yes, the ad insults two Republicans. Ms. Hilton's parents reportedly contributed $4,600 to the McCain campaign, no less. Ms. Spears has been captured on videotape touting her support for President Bush. Such is the gratitude and loyalty they get from the leader of their party.

The mean-spirited ad reveals McCain's callousness in 3-D. Yes, many feel that Spears and Hilton have often behaved like superficial, immature air-heads. But would it be too much to ask that an aspiring leader of the free world show a little more dignity and compassion toward them and others who may have psychological problems or substance-abuse issues?

It may be that McCain and his team didn't know they were trashing fellow Republicans. If so, that would be very sloppy research and compelling further proof that McCain is sorely lacking in management skills and as a judge of character and abilities of those who he would select to run the government. In any event, McCain's misguided hubris about the celebrity ad provides yet another indication of his lousy judgment.

It's McCain's campaign that is the real train wreck, and the most charitable explanation is that the engineer is asleep at the switch.