Obama welcomes representatives from 10 ASEAN countries to Sunnylands, a secluded 200 acre resort beloved by Frank Sinatra and US presidents since Dwight Eisenhower.
The visitors may have preferred the cachet of a White House visit and an Oval Office photo-op. But, like his predecessors, Obama is fond of the dry air, clean skies and the verdant fairways of this golfing Mecca.
Before sitting down at the summit table, Obama spent two days on the links.
Presidential trips to Vietnam and Laos are expected later this year to reinforce the point.
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They will have to try, however -- perhaps in vain -- to prevent the event from being overshadowed by the death of Supreme Court justice Antonin Scalia.
The leaders of Vietnam and Myanmar, facing their own domestic challenges, have dropped out, electing to send deputies instead.
The ASEAN bloc was once an afterthought in American policy -- too small, too diverse and too dysfunctional to be an effective player.