US President-elect Donald Trump has chosen Republican Party chairman Reince Priebus as his White House chief of staff and conservative media executive Stephen Bannon as his senior counsellor.
Mr Trump's transition team announced the decisions late on Sunday night.
Meanwhile, immigrants and their supporters have added their voices to those who have been marching and protesting over Mr Trump's presidential win.
Organisers said the protest scheduled for Sunday afternoon local time in Manhattan was about speaking out against President-elect Trump's support of deportation and other measures.
It was the latest in days of demonstrations across the country. Other protests were expected Sunday in San Francisco, St Louis Philadelphia, Denver and more.
On Saturday, demonstrators gathered in big cities like New York and Los Angeles, as well as in smaller places like Worcester, Massachusetts, and Iowa City, Iowa.
In Los Angeles, an estimated 8,000 people marched on Saturday to condemn what they saw as Mr Trump's hate speech about Muslims, pledge to deport people in the country illegally and crude comments about women.
Protests also were held in Detroit, Minneapolis and others. More than 200 people, carrying signs, gathered on the steps of the Washington state Capitol. The group chanted "not my president" and "no Trump, no KKK, no fascist USA".
In Tennessee, Vanderbilt University students sang civil rights songs and marched through campus across a Nashville street, temporarily blocking traffic.
Demonstrations also took place internationally. A group of Mexicans at statue representing independence in Mexico City expressed their concerns about a possible wave of deportations.
One school teacher said it would add to the "unrest" that's already in Mexico. About 300 people protested over Mr Trump's election as the next American president outside the US Embassy near the landmark Brandenburg Gate in Berlin.
Mostly, the demonstrations were peaceful. However, in Portland, Oregon, a man was shot and wounded on Saturday morning during a confrontation. Police arrested two teenagers in the shooting.
Protesters have gathered since Wednesday at Mr Trump's star on the Hollywood Walk of Fame in Los Angeles. Police in the city arrested five people during an anti-Trump protest that wound down in the early on Sunday.
Four adults were arrested for vandalism and a teenager was arrested on suspicion of assault on an officer.
