For American business interests in Asia, the fate of the Trans-Pacific Partnership (TPP) deal under a Donald Trump or Hillary Clinton administration is a major worry.
"The biggest thing we're concerned about is the TPP," Dwight Hutchins, chairman of the board of governors at the American Chamber of Commerce (AmCham) in Singapore, told CNBC's "Squawk Box."
The Singapore branch of AmCham, like its outlets around the world, and the U.S. Embassy were open in early hours of Wednesday in Asia to hold election viewing parties.
"We need to make them [Congress and each candidate] understand that 95 percent of the world's consumers are outside the U.S. and we need to be playing out in that marketplace, so the TPP will help," Hutchins continued.
The world's largest free-trade deal has been a signature economic objective of Democratic President Barack Obama but despite its potential benefits, including the creation of new jobs and a competitive advantage for U.S. firms in foreign markets, it has been opposed by both Trump and Clinton.