Ramesh – I agree entirely with your advice that McCain should paint Obama as a potential rubber stamp for a future Pelosi Prime Ministership (as I put it here yesterday). But I don’t know why it should be either/or. It seems to me you can make one argument while making the other. Something like this:

Barack Obama has never challenged the leftwing base of his own party. He has never broken with the myriad leftwing radicals he’s worked with except very late and only when politically necessary (and when he’s done so it has been both dishonest and with deep reluctance). When no one was complaining, he saw no reason not to be proud to work with people like William Ayers and Jeremiah Wright. He has never challenged the liberal establishment in Chicago or Washington. In Chicago he did the machine’s bidding. In Washington, he’s been a partyline voter. If Barack Obama doesn’t have the principles or the courage to stand up to Jeremiah Wright, William Ayers or the corrupt Chicago machine, why should we expect him to ever say no to Nancy Pelosi?

Whatever the Democratic Congress says Barack Obama’s answer will be “Yes We Can!”

Update: From a reader:

That sounds like a great idea for an ad. Find clips of Congressional Democrat leaders advocating kooky things. After each one, cut to a clip of Obama saying “Yes we can!” Lather, rinse, repeat.