By Kaanita Iyer, Matt Stiles, CNN (CNN) — Within weeks of retaking the White House, President Donald Trump boasted that he had “brought free speech back to America.” But since then, he has tested the limits of the First Amendment time and again, stoking alarm among civil rights experts and his critics. The First Amendment protects the freedom of religion, speech and press; the right to peaceful assembly; and the right to “petition the government…