NEW YORK (AP) — Whenever Donald Trump fumes about “fake news” or labels the press “the enemy of the people,” First Amendment scholar David L. Hudson Jr. hears echoes of other presidents — but a breadth and tone that are entirely new.

“Mr. Trump may not know it, but it was Thomas Jefferson who once said, ‘Nothing now can believed,'” said Hudson, a law professor at Vanderbilt University.

“But what’s unusual with Trump is the pattern of disparagement and condemnation of virtually the entire press corps. We’ve had presidents who were embittered and hated some of the press — Richard Nixon comes to mind. … But I can’t think of a situation where you have this rat-a-tat attack on the press on virtually a daily basis, for the evident purpose of discrediting it.”

Journalism marks its annual Sunshine Week, which draws attention to the media’s role in advocating for government transparency, at an extraordinary moment in the relationship between the presidency and the press.

First Amendment advocates call the Trump administration the most hostile to the press and free expression in memory. In words and actions, they say, Trump and his administration have threatened democratic principles and the general spirit of a free society: The demonizing of the media and emphatic repetition of falsehoods. Fanciful scenarios of voter fraud and scorn for dissent. The refusal to show Trump’s tax returns and the removal of information from government websites.

And in that battle with the Trump administration, the media do not have unqualified public support.

According to a recent Pew survey, nearly 90 percent of respondents favored fair and open elections while more than 80 percent value the system of government checks and balances. But around two-thirds called it vital for the media to have the right to criticize government leaders; only half of Republicans were in support. A recent Quinnipiac University poll found that Americans by a margin of 53-37 trust the media over Trump to tell the truth about important issues; among Republicans, 78 percent favored Trump.

“We’re clearly in a particularly polarizing moment, although this is something we’ve been building to for a very long time,” says Kyle Pope, editor in chief and publisher of the Columbia Journalism Review, a leading news and commentary source for journalism.

“I think one of the mistakes the press made is we became perceived as part of the establishment. And I think one of the silver linings of the moment we’re in is that we have a renewed sense of what our mission is and where we stand in the pecking order, and that is on the outside, where we belong.”

Hudson, ombudsman of the Newseum’s First Amendment Center, says it’s hard to guess whether Trump is serious or “bloviating” when he disparages free expression. He noted Trump’s comments in November saying that flag burners should be jailed and wondered if the president knew such behavior was deemed protected by the Constitution (in a 1989 Supreme Court ruling supported by a justice Trump says he admires, the late Antonin Scalia).

Hudson also worries about a range of possible trends, notably the withholding of information and a general culture of secrecy that could “close a lot of doors.” But he did have praise for Trump’s pick to replace Scalia on the court, Neil Gorsuch, saying that he has “showed sensitivity” to First Amendment issues. And free speech advocates say the press, at least on legal issues, is well positioned to withstand Trump.

“We have a really robust First Amendment and have a lot of protections in place,” says Kelly McBride, vice president of The Poynter Institute, a nonprofit journalism education center based in St. Petersburg, Florida. “That doesn’t mean that attempts won’t be made. But when you compare our country to what journalists face around the world, I still think the U.S. is one of the safest places for a journalist to criticize the government.”

The First Amendment, which states in part that “Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press,” is far broader and more uniquely American than when ratified in 1791.