Trump inauguration live updates: Donald Trump moves swiftly to implement his new agenda

Trump signed several executive orders before the cheering crowd, including freezing federal hiring except for the military and other excluded categories, requiring federal workers to return to full-time, in-person work immediately, restoring the freedom of speech and directing every federal department to address inflation.

The last order he signed in the arena, which directs the federal government to end the "weaponization of government against the political adversaries of the previous administration."

Trump tossed several pens into the crowd before leaving to head back to the Oval Office to sign more executive orders.

1. Halting 78 Biden-era executive actions

2. A regulatory freeze preventing bureaucrats from issuing regulations until the Trump administration has full control of the government

3. A freeze on all federal hiring except for military and a few other essential areas

4. A requirement that federal workers return to full-time in-person work

5. A directive to every department and agency to address the cost of living crisis

6. Withdrawal from the Paris climate treaty

7. A government order restoring freedom of speech and preventing censorship of free speech

8. Ending "weaponization of government"

The Senate quickly confirmed Marco Rubio as secretary of state Monday, voting unanimously to give President Donald Trump the first member of his new Cabinet on Inauguration Day.

Rubio, the Republican senator from Florida, is among the least controversial of Trump's nominees and vote was decisive, 99-0. Another pick, John Ratcliffe for CIA director, is also expected to have a swift vote. Action on others, including former combat veteran and Fox News host Pete Hegseth for defense secretary, is expected later in the week.

"Marco Rubio is a very intelligent man with a remarkable understanding of American foreign policy," Sen. Chuck Grassley of Iowa, the senior-most Republican, said as the chamber opened.

MORE | Senate confirms Marco Rubio as secretary of state

Trump also signed an order withdrawing the United States from the Paris Agreement.

The agreement was originally ratified at the annual United Nations Climate Conference in 2015. It intended to limit global warming to 1.5 degrees Celsius, compared to pre-industrial levels -- a metric scientists believed would significantly reduce the impacts of climate change.

During his first term in office, Trump withdrew from the agreement; Biden re-entered it on his first day in office.

Read more about Trump's climate agenda here.