BERLIN (Reuters) - It would not be good for the United States to erect new walls and isolate itself, German Economy Minister Sigmar Gabriel said on Wednesday.

Donald Trump, who is due to be inaugurated as U.S. president on Friday, won on a populist platform that included promises to build a wall along the Mexican border, restrict immigration from Muslim countries and implement "America first" policies.

(Reporting by Gernot Heller; Writing by Michelle Martin; Editing by Madeline Chambers)