"The amendment as adopted in 1791 reads as follows:
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; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances." Wiki
For those who may not have noticed, the federal government has three co-equal and mutually independent branches: Executive, Legislative and Judicial. President Trump is not a member of the Congress, nor is he the Congress. He clearly has no control over anything the Congress does.
Therefore the 1st Amendment's restriction does not apply to the president and he has made no effort to restrict the operations of the press.
Yes, he is a buffoon, but his utterances concerning the press are not a violation of the 1st Amedment. pl