Huffington Post has some advice for Sen. Obama in relation to the "lipstick on a pig" controversy.
I have some advice, too. Sen. Obama should abandon the lipstick on a pig metaphor because it is not original (Sen. McCain used it about Sen. Clinton's health care plan), and use the following ones instead.
When talking about the failed Bush/McCain agenda: "You can pour perfume on bullshit, it's still bullshit."
When talking about anything vicepresident Cheney says: "You can put a condom on him, he's still [a] Dick."
When talking about anything president Bush says: "You can put him inside the cover of the Merriam-Webster, it's still Bush."
When talking about Karl Rove: "You can put the word 'blossom' in his moniker, he's still a ...."
When talking about Gov. Palin: "You can put lipstick on her, it's still Karl Rove speaking."
And finally, when talking about Sen. McCain: "You can put fifty lobbyists in key positions of his campaign, he's still a maverick and a reformer." I call this last metaphor "reverse sarcasm" :-)