I am not a Trump fan in the slightest, but wow that is some poor journalism in that article. It immediately starts by stating a flatly-disproven narrative and then proceeds to say the sky is falling and Hitler's riding the clouds down to take us over. Barr is bad guy though, and so is Trump. I wouldn't find it unbelievable they might conspire to keep him in power, but this article doesn't present a very good case.
Fortunately the author has a Pulitzer to his credit and owns a publishing business, which in this market, some might even recognize as quite an accomplishment. I suspect he will continue to publish.
https://en.wikipedia.org/wiki/David_Cay_Johnston