While John McCain shifts from economics to national security, the RNC stays on the suddenly slippery numbers coming from Team Obama. Over the last two weeks, the definition of rich has begun morphing, much as Joe Wurzelbacher predicted:

OBAMA: If you make $250,000 dollars a year or less, we will not raise your taxes. We will cut your taxes. If you make less than $200,000 dollars a year, you’ll get a tax cut.

BIDEN: It should go to middle-class people… People making under $150,000 dollars a year.

VO: As time winds down to November 4th, so does Barack Obama’s definition of “rich.” In July, Obama said if you make less than $250,000 dollars per year you get a tax cut. Ten days before Election Day, he changes it to $200,000. And now, Joe Biden changes the threshold to $150,000.

If you’re wondering where you fit in, the answer is … Who knows?

WURZELBACHER: You know, $250,000 dollars now – what if he decides well, you know, $150,000 dollars, you’re pretty rich too, let’s go ahead and lower it again? You know, it’s a slippery slope… When’s it going to stop?

VO: Yesterday, he promised you a tax cut. Today, he promises he’ll change again. And tomorrow, he’ll “spread the wealth” to those that don’t even pay taxes at all.

Change. Change. Change.

Yeah, that’s Barack.

Part of this is due to a mix-up of terms, but I’m not going to exude much sympathy for a campaign that practically made its summer accusing John McCain of wanting a “100-year war” in Iraq. The cutoff for taxincreases was $250,000, while those below $150,000 would see a tax cut.  That would leave those in between at the existing rate, or so Obama claims.

What’s clear in this clip is that neither candidate really seems sure what’s in their own policy.  They casually toss out figures that seem contradictory without explaining what they mean.  That’s either incompetence, or it’s a deliberate attempt to plow the ground for some slippery-slope changes of the kind Joe the Plumber predicted.