When they say, "This is a jobs bill," you say, "This is a typical big government attempt to meddle in something they don't understand."
When they say, "This won't affect American sites," you say, "Search engines don't pirate movies. Neither do Visa or Paypal. Going after them is just unfair." [Note: Search engines. Not DNS. The minute you say DNS you lose.]
When they say, "Google profits from pirated software," you say, "Not as much as the congressmen are profiting from the $95 million dollars in lobbyist money that paid for this bill."
Other talking points: "How come congress can't seem to agree on anything that matters to the country? Unemployment, the deficit... they're totally gridlocked. But when the entertainment industry pays lobbyists $95 million to get a bill they wrote passed, both Republicans and Democrats line up to co-sponsor it."
Trying to say something that actually gets to the merit of the bill is a waste of time on a Sunday morning talk show... it's just too complicated an issue.