What he really means is that Janus takes away the right of the Democratic Party to abscond with your money via a third-party that functions as little more than a money-laundering go-between
Democratic Party chairman: SCOTUS ‘took away rights of American workers’ by not forcing them to pay union dues
To them, this really makes sense. To them, there’s no irony whatsoever to this statement.
How can that be? It’s because when Democrats talk about “rights,” they don’t really mean rights. The Democrat vision of America is that the federal government (run by Democrats, of course) orders everything that everyone does and decides how the spoils are divided up. When they force you to do something they have decided is good for you, it is your right to be so honored as to be able to follow their directive and to benefit as they have decided you should.