Politico

Presidents often spend their first days in the Oval Office signing a slew of executive orders. They typically change the policies of their opposite-party predecessors, a situation Harris wouldn’t face.

Joe Biden
Biden signed a record 17 executive orders on his first day in the Oval Office, a sweeping move to wipe away several Trump administration actions and implement expansive Covid-19 policies as the pandemic raged. He signed orders to require masks on federal property, froze student debt collection for most federal student loans and extended foreclosure and eviction moratoriums.

Overall, 12 of Biden’s first-day orders nixed Trump-era policies: He re-joined the World Health Organization and Paris climate accords, both of which Trump had pulled out of; halted the travel ban from several majority-Muslim countries and construction of the border wall, and strengthened legal protections for “Dreamers,” undocumented immigrants who arrived in the U.S. as children.