<p>US President-elect Joe Biden announced Tuesday he has appointed nine close campaign aides to key White House positions as he fleshes out a diverse leadership team less than a week after naming his chief of staff.</p>.<p>"America faces great challenges, and they bring diverse perspectives and a shared commitment to tackling these challenges and emerging on the other side a stronger, more united nation," Biden said in a statement.</p>.<p>The new appointees -- some of the first among hundreds that Biden will name to the White House in the coming months -- include his 2020 campaign manager Jen O'Malley Dillon being named deputy chief of staff.</p>.<p>The 44-year-old will serve under White House chief of staff Ron Klain, whom Biden appointed last week.</p>.<p>A veteran of seven presidential campaigns, O'Malley Dillon served as deputy campaign manager for Barack Obama's successful 2012 reelection effort.</p>.<p>Campaign co-chair Cedric Richmond, a House Democrat from Louisiana, was named senior advisor to the president.</p>.<p>The African-American lawmaker, 47, will leave his seat in Congress to take his White House job when Biden is inaugurated on January 20.</p>.<p>Biden also named Mike Donilon, a chief strategist for his campaign and a veteran Democratic tactician, to serve as senior advisor to the president.</p>.<p>"The team we have already started to assemble will enable us to meet the challenges facing our country on day one," Klain said in the statement.</p>.<p>Other appointments include the chief of staff and senior advisor to incoming First Lady Jill Biden, a counsel to the president and a director of Oval Office operations.</p>.<p>The appointments come as President Donald Trump continues to challenge the results of the November 3 election and refuses to concede the race to Biden, and as his administration has declined to formally cooperate with Biden's transition team.</p>
<p>US President-elect Joe Biden announced Tuesday he has appointed nine close campaign aides to key White House positions as he fleshes out a diverse leadership team less than a week after naming his chief of staff.</p>.<p>"America faces great challenges, and they bring diverse perspectives and a shared commitment to tackling these challenges and emerging on the other side a stronger, more united nation," Biden said in a statement.</p>.<p>The new appointees -- some of the first among hundreds that Biden will name to the White House in the coming months -- include his 2020 campaign manager Jen O'Malley Dillon being named deputy chief of staff.</p>.<p>The 44-year-old will serve under White House chief of staff Ron Klain, whom Biden appointed last week.</p>.<p>A veteran of seven presidential campaigns, O'Malley Dillon served as deputy campaign manager for Barack Obama's successful 2012 reelection effort.</p>.<p>Campaign co-chair Cedric Richmond, a House Democrat from Louisiana, was named senior advisor to the president.</p>.<p>The African-American lawmaker, 47, will leave his seat in Congress to take his White House job when Biden is inaugurated on January 20.</p>.<p>Biden also named Mike Donilon, a chief strategist for his campaign and a veteran Democratic tactician, to serve as senior advisor to the president.</p>.<p>"The team we have already started to assemble will enable us to meet the challenges facing our country on day one," Klain said in the statement.</p>.<p>Other appointments include the chief of staff and senior advisor to incoming First Lady Jill Biden, a counsel to the president and a director of Oval Office operations.</p>.<p>The appointments come as President Donald Trump continues to challenge the results of the November 3 election and refuses to concede the race to Biden, and as his administration has declined to formally cooperate with Biden's transition team.</p>