India, Dec. 7 -- US president Donald Trump will pick state department spokesperson and a former journalist Heather Nauert as the ambassador to the United Nations to succeed Nikki Haley.

Haley is set to leave the coveted cabinet-rank position seen as the face of American diplomacy at the global body later this month.

In another development on the personnel front, William Barr, who headed the justice department under late president George HW Bush, has emerged as the top contender to follow Jeff Sessions as attorney general, to head a department that oversees special counsel probe into Russian interference in the 2016 presidential elections.

Neither appointment had been announced by the White House till late Thursday, but Nauert's was bei...