James Biddle, president of the National Trust, gave a speech before the luncheon.
Before the luncheon, he met with large donors for a private round-table discussion and photo session.
Mr. Pullen, who delivered his candid assessment of Mr. Romney's candidacy in an interview before the luncheon, said the Romney campaign had much to be proud of.
The explosion came hours before a luncheon titled "Criminals Without Borders," which was held at the hotel as part of the forum.
When they walked onto the Progressive Field turf field two weeks ago, before a luncheon meeting, the scoreboard played the fight song for Ohio State, where Swisher played baseball.
Before the luncheon, conference participants received in their hotel rooms packages of cookies bearing the logos of the Super Bowl, the London Olympics and "Decision 2012" on NBC News.
"Thought I'd get here early, free booze," Mr. Clooney said in the interview room at the Beverly Hilton Hotel before the luncheon started.
"Investors may pull back up to $3 billion, no more," Mr. Soros said in an interview before a luncheon presentation in London.
"We've always known this race was going to be close," Mr. Murphy said before a luncheon with voters here, adding that Ms. McMahon has spent approximately five times as much on television ads as he has.
On June 1st, Obama spoke before a luncheon crowd at a farm-to-table restaurant in a converted warehouse in the North Loop of Minneapolis, just yards from the Mississippi River.
