CNN, NY Times, Poltico were barred from the Press Briefing. The AP and Time Magazine refused to attend in protest.
NY Times report here.
In case anyone wonders, the First Amendment reads:
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.