Upon further reflection, and after a discussion with State Rep. Jackie Walorski on Abdul’s radio show this morning, I’ve determined that there’s one question Republicans can’t — and don’t want to — answer: How is John McCain different from George W. Bush?

Same tax breaks for Big Oil, big corporations and the ultra-rich. No tax breaks for the middle class. (McCain, proud owner of six more homes than most folks, can’t even say the words “middle class” without visibly wincing.) Same strategy — or lack thereof — in Iraq. Same health care policies that come up short for average Americans. More and more and more of the same.

But a funny thing happens when you ask a Republican to talk about change: They start talking about Barack Obama.

When I asked Rep. Walorski to tell me the difference between McCain and Bush this morning, she couldn’t think of anything other than to resort to her talking points about Barack Obama as a big, scary tax guy.

Of course, we all know that’s not true. Obama’s plan would provide for tax breaks for 95 percent of America, and the other 5 percent, who are doing just fine, mind you, wouldn’t pay any more than they did under Ronald Reagan, who, according to an informal survey of Republicans, was the bestest President of all time.

Last night, when Gov. Sarah Palin was asked to differentiate between McCain and Dubya, she went into her “let’s talk about the future” dance.

One problem, as Biden adeptly pointed out: Past is prologue.

McCain and Palin are all about change because some poll told them to talk about change. They’re hoping talking points and the once-shiny-but-increasingly-cloying-and-annoying Celebrity Veep Pick will fool the American public into four more years.

We’re smarter than that.

But don’t take my word for it. Just ask any Republican to define McCain’s version of change. I bet you five bucks he or she starts talking about Barack Obama.