WASHINGTON — Donald Trump is preparing to sign executive actions on his first day in the White House on Friday to take the opening steps to crack down on immigration, build a wall on the U.S.-Mexican border and roll back outgoing President Barack Obama’s policies.

Trump, a Republican elected on Nov. 8 to succeed Democrat Obama, arrived in Washington on a military plane with his family a day before he will be sworn in during a ceremony at the U.S. Capitol.

Aides said Trump will not wait to wield one of the most powerful tools of his office, the presidential pen, to sign several executive actions that can be implemented without the input of Congress.

“He is committed to not just Day 1, but Day 2, Day 3 of enacting an agenda of real change, and I think that you’re going to see that in the days and weeks to come,” Trump spokesman Sean Spicer said on Thursday, telling reporters to expect activity on Friday, during the weekend and early next week.

Trump on Saturday plans to visit the headquarters of the CIA in Langley, Virginia. He has harshly criticized the agency and its outgoing chief, first questioning the CIA’s conclusion that Russia was involved in cyber hacking during the U.S. election campaign before later accepting the verdict. Trump also likened U.S. intelligence agencies to Nazi Germany.

Trump’s advisers vetted more than 200 potential executive orders for him to consider signing on healthcare, climate policy, immigration, energy and numerous other issues, but it was not clear how many orders he will initially approve, according to a member of the Trump transition team who was not authorized to talk to the press.

Signing off on orders puts Trump, who has presided over a sprawling business empire but has never before held public office, in a familiar place similar to the CEO role that made him famous, and will give him some victories with his supporters before he has to turn to the lumbering process of getting Congress to pass bills.

The strategy has been used by other presidents, including Obama, in their first few weeks in office.

“It sends two messages. The first is that he wants to show he will take action and not be stifled by Washington gridlock. The second is that he will move forward on reversing policies that he believes to be broken and bad,” said Princeton University presidential historian Julian Zelizer.

Trump also is expected to impose a federal hiring freeze and take steps to delay implementation of a Labor Department rule due to take effect in April that would require brokers who give retirement advice to put their clients’ best interests first.

Obama, ending eight years as president, made frequent use of his executive powers during his second term in office, when the Republican-controlled Congress stymied his efforts to overhaul immigration and environmental laws. Many of those actions are now ripe targets for Trump to reverse.