Washington DC, U.S: Speaking at a Washington think tank in the summer of 2016, Adewale Adeyemo, President Barack Obama’s international economics adviser, warned about the perils of protectionism, explained how a growing Chinese economy was good for the world and talked up the Trans-Pacific Partnership, a trade deal he helped negotiate that Democrats ultimately rejected. Four years later, such talk might sound out of touch with a Democratic Party that has become even more hawkish on China and increasingly wary of sprawling international trade deals. But that was not a concern for President-elect Joseph R. Biden Jr., who this week tapped Mr. Adeyemo to be deputy Treasury secretary, solidifying his team with another stalwart veteran of the Obama administration who would bring center-left economic ideas, deep experience and diversity to Mr. Biden’s top ranks. Adewale "Wally" Adeyemo (born 1981) is a Nigerian-born American attorney and political advisor serving as the first presi...