Donald Trump backed away Tuesday from his pledge to deport 11 million immigrants in the country illegally.

It was a dramatic shift for the Republican presidential nominee, whose vow to crack down on illegal immigration has been a pillar of his candidacy.

Trump's reversal highlighted the difficulty he faces in trying to broaden his appeal without turning off his most fervent supporters.

At rallies and debates over the last year, Donald Trump has repeatedly vowed to round up and deport the estimated 11 million people in the country illegally, sometimes saying he would eject them all in two years.

Over the last four days, however, the GOP presidential nominee and his top aides have issued contradictory signals as to whether Trump is backing off that core campaign pledge.

Aides have not said whether Trump’s plan is under review because it appears politically unpalatable with moderate Republicans, or because forced deportations of millions of people would be prohibitively expensive and probably logistically impossible.

Collecting millions of dollars in campaign contributions, Hillary Clinton kicked off a second-day of star-studded fundraising in California on Tuesday with a stop at Justin Timberlake and Jessica Biel’s Hollywood Hills house.

Among the 100 supporters who paid $33,400 per person for the luncheon were actors Jennifer Aniston, Jamie Foxx and Tobey Maguire.

“Hillary Clinton continued to talk about how she believes that we are stronger together — that America succeeds when we work together to solve our problems and when everyone shares in the rewards — not just those at the top,” according to a Clinton aide. "[S]he also discussed how Donald Trump has shown that he is temperamentally unfit and unqualified to be president.”

A bigot. Deceptive. Opportunistic. 

These were just some of the harsh descriptions doled out by surrogates of Hillary Clinton on Tuesday as they condemned Donald Trump's overt pleas in recent days for the support of African Americans and Latinos. 

The Republican presidential nominee's campaign has been been marked by divisive and racially coded rhetoric, yet in recent days he has softened his message and insisted that he's best fit to improve schools, create jobs and foster safer communities for blacks. 

Melania Trump has threatened to sue several news organizations, including Politico and The Daily Mail, for defamation.

Charles Harder, an attorney representing Trump who previously represented Hulk Hogan in a successful lawsuit against Gawker Media, said on Monday that the outlets have been put "on notice" for "making false and defamatory statements about her supposedly having been an 'escort' in the 1990s."

According to the Washington Post, the news organizations cited a Daily Mail article that referred to a report initially published in Slovenian publication Suzy magazine.

Hillary Clinton will deliver a speech in Nevada on Thursday designed to raise questions about alleged connections between Donald Trump's presidential campaign and conservative extremist groups.

"This 'alt-right' brand is embracing extremism and presenting a divisive and dystopian view of America which should concern all Americans, regardless of party," the Clinton campaign said in a statement. "In her remarks, Clinton will contrast Donald Trump's divisive views and dangerous temperament with her vision of an America that is stronger together and where everyone has a role to play in the future."

The term "alt-right" describes a loosely affiliated group of hard-right, anti-immigration and anti-establishment conservatives. Critics have accused the movement of supporting white nationalist goals, including removing African Americans, Latinos and Jews from the United States.

Protesters lined up Monday in front of the Beverly Hills estate of Haim Saban, a billionaire and longtime Democratic backer who hosted a fundraiser for Hillary Clinton. 

Karen Pomer of Jews for Palestinian Right of Return argued that if Clinton plans to accept campaign funds from Saban, an entertainment tycoon and prominent supporter of Israel, she must answer for what Pomer's group sees as a show of support for Israeli Prime Minister Benjamin Netanyahu's harsh line on Palestinians.  

"Palestinian human rights are not for sale," she said.

Donald Trump’s campaign manager scrambled Tuesday to reassure supporters that he is sticking to his immigration plan after days of muddled messages from the Republican presidential nominee.

Trump has no plans to step back from his hard line on deporting approximately 11 million people in the U.S. illegally, Kellyanne Conway said.

“He’s said exactly the same thing all along: ‘Let’s enforce the law,’” Conway told Fox News.