That’s a great question and it should be included. I guess we’re supposed to infer they are all Dims, given the article mentions progressives, Holder, NAACP, ACLU, etc. “are doing everything they can to prevent states from improving the integrity of the election process”. But, I think only those of us that are informed conservatives and read FR, etc. would easily know the author is referring primarily to Dims. He should have included the party affiliation.
That is basic and I don't know why ‘journalists’ can't seem to accomplish even the most rudimentary goal of reporting.