Many politicians and pundits reacted harshly Sunday after President Donald Trump railed against the media on Twitter sparked by a "Saturday Night Live" sketch that mocked his performance at a Friday White House news conference where declared a national emergency at the U.S.-Mexico border.

"Nothing funny about tired 'Saturday Night Live' on Fake News NBC!" the president tweeted. "Question is, how do the Networks get away with these total Republican hit jobs without retribution? Likewise for many other shows? Very unfair and should be looked into. This is the real Collusion!"

"THE RIGGED AND CORRUPT MEDIA IS THE ENEMY OF THE PEOPLE!" he added minutes later.

A number of Trump's critics quickly fired back at what they saw as an attack on the First Amendment, which protects freedom of speech.

Rep. Ted Lieu, D-Calif. said, "One thing that makes America great is that the people can laugh at you without retribution."

'SNL':Trump slaps back after Alec Baldwin mocks his national emergency news conference

Such attacks on the media from the president have "become commonplace enough in the past two years that it no longer gets much notice," New York Times White House correspondent Peter Baker said.

"But it's worth remembering that no other president in decades publicly threatened "retribution" against a television network because it satirized him."

Some commentators pointed out the violence that has been directed toward members of the news media in recent months, including a man who allegedly assaulted a BBC cameraman at a Trump rally, a man who allegedly mailed pipe bombs to CNN and several Trump critics, the murder of Washington Post columnist Jamal Khashoggi and the fatal shooting of five reporters at the Capital Gazette in Annapolis, Maryland.

Here are some other reactions to Trump's "SNL" tirade: