I notice so far they have not tried to use the “far-right” argument here in USA.
Trying to put the opposition candidate in prison was a pretty obvious version of it.
You need to get out more.
The exact argument which is the foundation of the German Basic Law (Grundgesetz) is spreading like wildfire among American leftists, and if they ever get back into power you can bet that it will be exactly what they will do.
Here's the question you need to answer for yourself: Are the voters free to elect a communist to office? Are the voters free to elect a national socialist to office?
If your answers to the two questions are different, please explain why.