Are we headed toward censorship?

ABC news has struck a deal with the President to host his Obamamercial promoting his health care reform ideas. ABC is claiming that this will not be an infomercial for the President and that the audience will be asking the President real questions. However, ABC would not sell airtime to advertisers with views that oppose the President's plan. How balanced can the coverage be without a word from the opposition? What happened to giving ad space to the highest bidder? This sounds a little like something called censorship.