No matter what Trump does now, his past four years have left a mark on immigration, the federal bench and the nation's raging political divisions.

John Katko, voted to impeach President Donald Trump.

WASHINGTON – President Donald Trump's time in the White House will come to an end Wednesday, but his influence – for better or worse – will continue to shape politics in Washington and the rest of the nation far beyond his four years in office.

The catastrophic events of 2020 and early 2021 left political observers bearish on whispers that Trump is considering another run for president in 2024.       .

No matter what Trump does, the tumultuous four years he has just put behind him have already left a mark.

President Donald Trump presents the Presidential Medal of Freedom to wrestler Dan Gable on Jan.

Opponents have been horrified that Trump's words often seemed designed to divide and denigrate rather than to bring together a nation frayed by division.

After a few years into Trump's term, personal name calling in politics had become so routine that it hardly registered when Biden referred to the president as a "clown" during their first debate in September or House Speaker Nancy Pelosi called him a "coward" in an interview in 2019.

A Georgia election official called on President Trump to condemn and "stop inspiring" recent threats of violence over the election.

If past is prologue, Trump won't remain out of sight for long.   .

"No person in American history has had as much rhetorical power as Donald Trump has had over the past five years," Mercieca said.

The most prominent of those were made to the Supreme Court, where Trump seated three justices – Neil Gorsuch, Brett Kavanaugh and Amy Coney Barrett – over the course of four years in the White House.

Amy Coney Barrett is one of the three justices President Donald Trump elevated to the Supreme Court, pushing it in a more conservative direction. (Photo: Patrick Semansky, AP).

President Donald Trump promised a "big, beautiful wall" along the U.S.-Mexican border. (Photo: Getty).

Unable to broker agreement with Congress on a broad immigration plan, Trump acted unilaterally to slash the nation's asylum program and deny entry to Central American migrants, many of whom wait in Mexico instead of the USA as their claims are processed. He applied diplomatic pressure on Mexico and Central America to stem the flow of people seeking to flee violence and poverty.

Immigration: Biden might need years to reverse Trump's immigration policies.

"President Trump's biggest legacy on immigration will be significantly expanding the executive's authority over and involvement in immigration policymaking," said Sarah Pierce, policy analyst at the Migration Policy Institute.

"There has never been such an activist administration on immigration," she said, noting the White House revealed all the ways a president can influence immigration.

NATO Secretary-General Jens Stoltenberg speaks with President Donald Trump in Watford, Hertfordshire, England, on Dec

Though Trump came short of massive deregulation, his administration hit the brakes on new rules

“While actual deregulation during the Trump administration didn’t match the rhetoric, his agencies did reduce the pace of new regulations dramatically,” said the center’s director, Susan Dudley

President Donald Trump faces a second impeachment. (Photo: GETTY)

Trump never forgave McCain and continued to bring up his vote at rallies years after the senator died in 2018. 

About 12 million people enrolled in an ACA plan in 2017, the first year Trump took office, according to the nonpartisan Kaiser Family Foundation

By the end of 2020 – after years of Trump's harsh criticism of the law – enrollment had fallen to 11 million people.