Trump announced in a social media post on Friday afternoon that he was appointing Gor, who runs the Presidential Personnel Office, to serve as ambassador to India and as special envoy for South and Central Asian affairs.

Who is Sergio Gor, and what signal does his nomination as ambassador to India send? When is he likely to arrive in India? We explain, in four points.

President Donald Trump said on Friday he would nominate Sergio Gor, one of his closest aides, to be the next U.S. ambassador to India, where he will oversee frosty relations that have worsened with the planned doubling of U.