It's the narrative du jour of the Democrat Party.
The more often a Democrat says "Republicans will destroy Democracy", the more likely that their target audience will believe them and will fail to recognize that it is the Democrats who hate Democracy.
Rank and File Leftists are so tied up in the rhetoric that they don't hear what's being said. Bottom line? Democrats want "one party rule". They have no desire to work with Republicans on the "big issues". That doesn't sound very "democratic" to me.
Here we are.