KEY POINTS
President Donald Trump flanked by Secretary of State Rex Tillerson (L) and Defense Secretary Jim Mattis (R) on April 4, 2017.

Despite an ambitious agenda, the Trump administration is wrapping up its first 100 days with a long list of campaign promises to work on — and a longer list of White House positions that remain empty.

Some three months into Trump's term, two of his nominees, Labor secretary nominee Alexander Acosta and Agriculture secretary nominee Sonny Perdue, have yet to be confirmed.