But he came away from his trip to this corner of the world a place once defined by a cloistered and shunned nation like Myanmar or by Khmer Rouge "killing fields" or by Chinese power with at least the hope that the example of U.S. democracy can effect change and strengthen America's hand.
He made his case clearly during a Bangkok news conference:
"It's worked for us for over 200 years now, and I think it's going to work for Thailand and it's going to work for this entire region," he said. "And the alternative, I think, is a false hope that, over time, I think erodes and collapses under the weight of people whose aspirations are not being met."
Establishing a bigger, more influential presence in the Asia-Pacific region has long been an Obama objective, a goal driven by 21st century geopolitical considerations and by the Hawaiian-born president's own self-identity as the first Pacific president.
Just by making the trip and by making it his first after his re-election Obama made a point about the importance the U.S. attaches to the region.
He was greeted by large crowds chanting his name in Thailand and in Myanmar, a country less than two years removed from a repressive military dictatorship where such assemblies were long forbidden. The English-language Myanmar Times newspaper heralded the arrival of "O-Burma" on its front page, while Thai newspapers praised his apparent interest in the native brand of Buddhism following his monastery visit.
The reception was more muted in neighboring Cambodia, a staunch ally of China that pointedly displayed a sign at the presidential palace welcoming Chinese premier Wen Jiabao but nothing for Obama. Still, there was a message for Asia in Obama's mere presence. The president was attending an annual summit of Southeast Asian leaders in Phnom Penh, yet another indication of U.S. intentions to pay a bigger role in the region.
The trip marked the first time a U.S. president had visited Myanmar and Cambodia.
For decades, Myanmar, despite its alluring pagodas and verdant countryside, was an international outcast with a repressive military junta accused of gross human rights abuses. But last year it began to shift toward democracy, and Obama went there to welcome the change and encourage more.
His motorcade sped to the lakeside home of opposition leader Aung San Suu Kyi, the Nobel Peace Prize winner who spent the better part of 20 years under house arrest. He embraced her and praised her as an "icon of democracy."
Obama's aides hoped that image would dominate back in the United States, but news events and coverage didn't go quite as planned. Hostilities in Israel and Gaza overshadowed the president's trip. He spent every day monitoring developments. Monday night he was on the phone until 2:30 from Phnom Penh, calling Israeli Prime Minister Benjamin Netanyahu once and Egyptian President Mohammed Morsi twice.
By Tuesday morning he had dispatched Secretary of State Hillary Rodham Clinton, who had been traveling with him in Southeast Asia, to the Mideast to engage directly in Jerusalem and Cairo. And he called Morsi again from Air Force One on the way home.
Efforts to break a stalemate with Congress over a deficit-reduction package also dogged him, even as congressional and White House staffs worked to frame details that Obama and legislative leaders could begin negotiating next week.
After the monk surprised him by wishing him well on the fiscal cliff at the Wat Pho monastery, Obama still could not escape it, facing a question about it during his Thailand press conference. No problem, the Americans said.
"We believe the United States can walk and chew gum at the same time," Deputy National Security Adviser Ben Rhodes said Tuesday in Phnom Penh. The shift of resources and attention to Asia will occur with or without diversions, he said. "We'll continue to move forward with our pivot even as we manage the inevitable crises and challenges that will come up in other regions."
Indeed, after spending months mired in a biting presidential campaign, Obama appeared to revel in being back on the world stage.
The trip was poignant, too. It marked his last overseas tour alongside Clinton, his former rival turned partner. Clinton has long said she plans to leave the administration ahead of Obama's second term, or shortly after it is under way.
Obama and Clinton flew across Southeast Asia together on Air Force One and walked down the plane's front steps together in Myanmar and Cambodia.
He singled her out at Suu Kyi's home. "I could not be more grateful, not only for your service, Hillary, but also for the powerful message that you and Aung San Suu Kyi send about the importance of women and men everywhere embracing and promoting democratic values and human rights," Obama said.
Aides said the two reminisced aboard the presidential plane flying back from Myanmar to Cambodia.
Clinton herself said traveling with Obama one last time was "bittersweet, nostalgic, all the things you would expect."