I did a "find" search for the term Democrat. It's only in there four times. The term Republican is in there six times.
If you read the article and acknowledge the context that the two words were used you’ll see it is very favorable to the Republicans and not so much for the Democrats.
The Readers Digest version is the Awans 44 employers were all Democrats and all 44 Democrats refused to answer any questions and all 44 Democrats are not helping in the investigation - meanwhile, Republican investigators said that this can never happen again ... etc.
I don’t see a problem with how the Democrats and Republicans were used .... you?