The former president and Georgian said he was "very proud" of the run made by the NFL's Atlanta Falcons this season. 

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"I thought it was their year," he said of the Falcons.

The Falcons lost the NFC Championship game, and a chance for the franchise's second trip to the Super Bowl, to the San Francisco 49ers on Sunday.

"It was a good game and I'm so proud," he said of the 28-24 result. "They came up short, four points short." 

Carter, who also is a big Atlanta Braves fan and is frequently seen in the stands, said he is now looking forward to baseball season. 

The Democratic president wasn't the only former commander in chief seen mingling. 

Former President Clinton shook plenty of hands before the lunch, giving a handshake and shoulder pat to Sen. John KerryJohn Forbes KerryLet's not play Charlie Brown to Iran's Lucy The Memo: Democrats struggle to find the strongest swing-state candidate 2020 caucuses pose biggest challenge yet for Iowa's top pollster MORE (D-Mass.), who is slated to take his wife, Hillary ClintonHillary Diane Rodham ClintonSanders supporters cry foul over Working Families endorsement of Warren The Hill's 12:30 Report: Trump heads to California Hillary Clinton: Voter suppression has led to 'crisis in democracy' in the US MORE's, spot atop the State Department. 

Former Presidents George H.W. Bush, who was recently released from hospital after an extended stay, and George W. Bush did not attend the inaugural.