They have been partisans for at least 50 years, probably longer.
The networks were significantly Progressive partisans back to when FDR used the new FCC to make sure the radio networks were on his side.
It is very aggravating to me (and I don’t think I am the only one) that an otherwise intelligent column such as this is tainted by numerous errors in grammar, spelling, and punctuation. I think that for a significant portion of the readers, it detracts from the author’s credibility.
Blogging without proofreading has depreciated the writing in this country.