The 48-hour build-up to President Trump’s first Oval Office address to the nation was chock-full of breathless hand-wringing in the media over whether they should air the speech in the first place. “How can we air a speech that will be full of lies and distortions?” they asked each other on endless panel shows. “Maybe we should tape-delay the address so we can contextualize his statements and provide a thorough fact-check,” they insultingly suggested. This is the Trump era. Fact-checking has moved into the mainstream. CNN’s 22-year-old production assistants are now responsible for running lower-third graphics designed to snark the...