He [Trump] can monitor (yes, that’s definitely a creepy word) and watch all he wants, but it will not matter one bit. Because the First Amendment requires only that the government not make laws that restrict freedom of speech for its citizens.
Here’s the whole text if you need a refresher — and anyway, it’s kind of short: “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.”