Donald Trump's campaign chief spent Sunday morning placating supporters of the Republican presidential nominee concerned that he is softening his positions on immigration, suggesting that whatever the change, he's far better on the issue than Hillary Clinton.

Asked during an appearance on Fox News Sunday to respond to Trump's critics, Trump campaign chief Kellyanne Conway said, "I would really implore the viewers to look at the contrast between Donald Trump and Hillary Clinton. There are very few issues where they're more different."

Trump is said to be re-evaluating where he stands on mass deportation, working to develop a "fair and humane way" of dealing with the 11 million immigrants currently living in the U.S. illegally. The changes have led some of his most loyal supporters to question whether he is headed toward adopting immigration policies similar to those espoused by his GOP primary rivals.

"Trump: 'They have to pay taxes, there's no amnesty' [Pro Tip: 'Back taxes' means we pay illegals $30k apiece in earned income tax credits]," Ann Coulter, the author of In Trump We Trust: E Pluribus Awesome!, tweeted last week, along with several other tweets that were critical of Trump's recent comments on immigration.

"Whatever remaining chance he had to win the White House is gone," Mark Krikorian, executive director of the Center for Immigration Studies, told the Wall Street Journal. "The fact now that he has betrayed his base on the signature issue that he ran on seems to me the death knell of his candidacy as a practical matter."

"I would say to all those people, and Mr. Trump's supporters, that when you look at his plan and you look at the no amnesty and him building a wall, endorsing the law and making sure there's no legalization, it's exactly what he's been talking about altogether," Conway told CBS' John Dickerson.

"And by the way," Conway continued, "there are two major choices in that ballot box and if you look at Hillary Clinton's immigration plan you see a real convergence of a plan that would actually create more illegals coming in here, porous borders, sanctuary cities continue, catch-and-release so that local law enforcement's arms are tied."

"Donald Trump has said, if you committed a crime you're out of here," she told Dickerson. "So this isn't just a referendum on Donald Trump's immigration policy, it's really a contrast with Hillary Clinton's."