Yes - it’s a matter of standing - in this case libel would apply to NRA I’d think. In addition to +/- following FOIA - an action should be filed with the FCC to investigate that fake Town Hall just like helped CBS bail on Dan Rather. However, in that matter, the key was that CBS content was distributed to its affiliates i.e. local stations and that aspect of licensing came under jurisdiction of FCC.
I was thinking more of how it could benefit POTUS against the very fake news media. For example when they were all calling him crazy.
https://www.newyorker.com/news/news-desk/how-anti-trump-psychiatrists-are-mobilizing-behind-the-twenty-fifth-amendment - The removal of Trump using the Twenty-fifth Amendment is the aim of a newly launched social movement composed of mental-health professionals. The group, called Duty to Warn, claims that Donald Trump “suffers from an incurable malignant narcissism that makes him incapable of carrying out his presidential duties and poses a danger to the nation.”
Which is very similar to when Barry Goldwater sued fact magazine and won:
https://en.wikipedia.org/wiki/Goldwater_v._Ginzburg - The court found that the evidence introduced at trial proved the defendants knew they were publishing defamatory statements and “were motivated by actual malice when they published the statements.”[2] The court found the defendants guilty of libel action based on the article Fact published. The plaintiff demanded $1,000,000 in compensatory and punitive damages but Senator Goldwater was awarded $1 in compensatory damages and $75,000 in punitive damages
This is the Fact article titled 1,189 psychiatrists say Goldwater is psychologically unfit to be president.
https://www.scribd.com/document/322479204/Fact-Magazine-Goldwater-1964
Trump has said he wishes US laws were more like the UK’s
http://money.cnn.com/2016/10/24/media/donald-trump-sue-news-organizations/
In the States, the publisher’s statement is essentially presumed true, because the plaintiff has the burden to prove it false. In a libel lawsuit in Britain, the statement is presumed false, and the burden is on the publisher to prove each material fact is substantially true.
So we’ll see I guess.