Republicans and critics of Democrat-led health care reform are stepping up their counter-offensive in response to ABC News' scheduled prime-time special Wednesday on President Obama's health care proposals.

Rick Scott, who heads advocacy group Conservatives for Patients' Rights, said his group was rebuffed when it asked ABC News to run its ad criticizing the president's health care pitch.

ABC has said the network has a "longstanding" policy not to accept advocacy ads, and that it even refused to air Obama's extended infomercial the week before the November presidential election for that reason.

Scott, though, said he found instances in which ABC News had run advocacy ads and in a letter this week notified the network of the apparent discrepancy.

Scott joins Sean tonight to share his ad warning against a government-run plan health care plan and comment on ABC News' rejection. Karl Rove and Ann Coulter will also chime in on the 'Obama infomercial.'

Will you watch the ABC-Obama health care forum?