DAVOS, Switzerland ? Donald Trump is not among the attendees at this year's edition of the World Economic Forum in Davos, but his potential reelection as president of the United States is very much part of the conversation at the Swiss Alpine resort.

"Every question I've gotten as I've walked up and down the [Davos] Promenade today is, 'is he coming back?'" Tim Adams, president of the Institute of International Finance, told CNBC on Tuesday.

"So, I think there is a lot of interest in that question and what does that mean, and who would be in the key positions," he added.