Because they control the MASS MEDIA...the Democrats deliver ammo* for barrage. Take the dueling memos...for instance. The Republicans discovered "election rigging" on the part of TEAM OBAMA and issued a memo addressing their concerns. In reaction...the "exposed Democrats" published their own version...with the complicit MASS MEDIA telling the world: while naked...their clothes regal in stitch.
*Undaunted by the Trump-hate levied against his team 24/7...to a crowd in Ohio...President Trump declared: "We finally caught them"...referring to the discovery of the illegal activities of TEAM OBAMA during the 2016 election cycle.