John McCain's campaign slammed Barack Obama in a conference call with reporters today, with spokesman Brian Rogers saying the decision to opt out of public financing "was all about money."

Campaign counsel Trevor Potter disputed the statements of Obama campaign counsel Bob Bauer, who e-mailed his version of their meeting to Politico's Ben Smith. Potter said there were "no negotiations" about a deal between the two campaigns regarding the candidates' participation in the public financing system.

Potter claimed the entire meeting, which was called to discuss a separate issue, lasted a total of 40 minutes. Bauer, according to his e-mail to Politico, said the portion of the meeting in which public financing was discussed lasted 45 minutes alone. Rogers stated that regardless of how long the meeting was, Obama had previously stated that he would "agressively" seek a deal with McCain, and such agressive pursuit of a deal on the issue, according to Rogers, did not occur.

Potter continued to describe the meeting, saying he "assumed that was the prelude" to a request to negotiate, though, he said, he never heard back from the Obama campaign before today's announcement that Obama would opt out. "The meeting that Bob Bauer and I had was not a negotiation," Potter said. "I didn't know what the Obama campaign wanted to ask for. ... It wasn't clear to me where the Obama campaign wanted to go with the discussion."

Prior to the conference call, Bauer sent an e-mail to McCain communications director Jill Hazelbaker (which he forwarded to reporters) requesting the call-in information so that he could participate. The request was apparently denied, as the McCain campaign made opening statements and answered questions from three reporters before ending the call.

UPDATE: Here is audio of the entire McCain conference call.