Obama showed no signs of strain, hours after unleashing the latest US Middle East war, in Syria, and was in jovial mood, at the annual philanthropy fest hosted by a Democrat who preceded him as president -- Bill Clinton, and a Democrat who may seek to succeed him, Hillary Clinton.
Obama played on the preoccupations of two proud grandparents-to-be and their only daughter and poked fun at New York motorists who chafe every year at traffic nightmares brought on by the annual United Nations General Assembly (UNGA).
"Actually, it's pretty smooth for me during the week. I don't know what the problem is -- everybody hypes the traffic .... I haven't noticed."
Every time the US president drives the streets of New York, its concrete and glass canyons are cleared of traffic, for his two armored limousines and cavalcade of Secret Service vehicles, heavily-armed SWAT teams and minibuses for officials and the press and an ambulance.
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The Clintons have not named a due date for their long-awaited first grandchild.
But the former president told CNN he hoped he would be a grandfather by October 1.
Obama also paid a compliment to Hillary Clinton, who served as his secretary of state during his first term and is now whipping up a new round of presidential speculation ahead of the 2016 White House race.
"She has the post administration glow right now -- she looks much more rested," said Obama.