You should be wary of propaganda. It can occur in anything! Let's look at the Boston Massacre.
Colonies Newspaper would say...
Seven armed soldiers shoot unarmed men and children, killing and injuring many.
England's Newspaper would say...
Seven soldiers were forced to shoot men who were armed with rocks and ice. They started a riot, forcing the soldiers to do something.
The same thing happens between democratic and republicans news.
Hope this helps! Have a happy holiday!