Your Grammar Nazi

For the sake of my sanity, I'm going to start this irregular feature to run whenever I see a grammar mistake online made by professionals who should know better.  Might be several a day, might be every day, might be once a month. Maybe this first one will be the last. But I have to do this or go nuts.

 

Rick Hasen at TPM:

We are one of the only mature democratic nations to allow partisans to run our elections, and to give local officials, often underfunded and sometimes incompetent, control over key aspects of the voting process.

 No!  There's no such thing as "one of the only." We might be "the only" or "one of the few" but not both.