One of the traits of a progressive liberal is their ability to ignore the established meaning of any word, and apply their own meaning, that fits their agenda.
A couple of examples, gay marriage, one of their biggies, where they turned civil unions into marriage, because they had big enough mob to agree with them.
Another biggie is “choice”. That is where they turned murder into a choice for woman only. Again the size of the mob is very important.
So now the mob is headed toward their new meaning for our 2nd amendment. Sort of a graduation from a word’s meaning to their own interpretation of a complete Constitutional amendment.