From RedState's action alert email to me today:
There are troubling whispers in Washington that John McCain might soon endorse the
Gang of 16 Energy Proposal. It would be a terrible mistake for John McCain to sign on to this plan. Endorsing this plan would be the policy equivalent of picking a pro-abortion running mate.
Link mine, as reference if you don't know what the proposal is. I'll also note
this bit of suggested strategy. Obama hasn't signed on as a co-sponsor, but he's said he supports it.