“President Trump has opened a new front in his campaign to intimidate political foes, threatening a prominent liberal think tank with a $5 billion defamation lawsuit over a report concluding that his deployment of the National Guard to cities across the country has had little effect on reducing violent crime,” the New York Times reports.“The threats against the think tank, the Center for American Progress, were Mr. Trump’s latest effort to use the legal system to punish critics for voicing unflattering facts and opinions generally protected by the First Amendment.”