On Wednesday, CNN's Jim Acosta unwittingly demonstrated the difference between an unbiased, truth-seeking media and a biased, hostile and advocacy media. We need a watchdog press in this country, but its proper function is to report the news, not become the story. Acosta had displayed his obnoxiousness before, but he descended to a new low this week. Earlier in the day, President Trump had appeared with Sens. Tom Cotton and David Perdue to endorse their immigration bill, called the RAISE Act. The bill was the major focus of the White House press briefing, and presidential adviser Stephen Miller outlined its...