Tucker Carlson and his feud with the NSA

Tucker Carlson is a huge media figure, and I’m discussing the possibility of him floating claims out to his audience without providing evidence of said claims.

Don’t you think a ‘journalist’ making claims to his audience has a burden to then show that audience evidence of his claim?

Don’t you think that that lack of evidence is, in and of itself, evidence that this person in the media, is not only not a journalist, but also carries a bias?

I’m posting pretty normal questions here about journalistic standards.