The e-mail exchange that day three years ago was among a cache of messages obtained from the industry and released in recent weeks by House Republicans — including a new batch put out on Friday morning detailing the industry’s advertising campaign in favor of Mr. Obama’s proposal. The broad contours of the president’s dealings with the drug industry were known in 2009 but the newly public e-mails open a window into the compromises underlying a health care overhaul now awaiting the judgment of the Supreme Court.

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Republicans see the deal as hypocritical. “He said it was going to be the most open and honest and transparent administration ever and lobbyists won’t be drafting the bills,” said Representative Michael C. Burgess of Texas, one of the Republicans on the House Energy and Commerce subcommittee that is examining the deal. “Then when it came time, the door closed, the lobbyists came in and the bills were written.”

Some of the liberals bothered by the deal-making in 2009 now find the Republican criticism hard to take given the party’s long-standing ties to the pharmaceutical industry.

“Republicans trumpeting these e-mails is like a fox complaining someone else raided the chicken coop,” said Robert Reich, the former labor secretary under President Bill Clinton. “Sad to say, it’s called politics in an era when big corporations have an effective veto over major legislation affecting them and when the G.O.P. is usually the beneficiary. In this instance, the G.O.P. was outfoxed. Who are they to complain?”