No surprises in an article by a self-admitted hard left winger.

The reason, Mr. Caplan, why people are increasingly turning to the third parties in the USA is that the Republicans and Democrats have far removed themselves from actually governing "for the people".

Voting for a party not affiliated with these two does not mean those votes are cast for "fringe" parties (gosh I wish there was a way to emphasize without using quote marks).  The Libertarian is probably closer to centre than either the Reps or Dems.

Nevertheless, whoever a US citizen may vote for, that remains and should always be their free and private choice.