Watch a view of the White House ahead of Donald Trump's presidential inauguration on Monday (20 January). Freezing cold weather gripped much of the northeastern US, and the inauguration ceremony was moved inside to the Capitol’s rotunda.

He seems much more comfortable, almost relaxed in how he’s doing the job,” according to Sean Spicer, Trump’s first White House press secretary, who said Trump is showing a new “level of confidence,” having spent four years in office.

The website typically changes with a switch of administrations. But rarely has it been such a dramatic change.

The White House is considering challenging the constitutionality of a 50-year-old law limiting the president’s control over federal spending, easing the firing of civil servants, curbing pay and reining in independent agencies,