Why do they call themselves Progressives?
For the same reason the center-right party in Canada has "Progressive" in their name, and the center-right party in Australia is the Liberal Party, while the fascist party in the U.S. is calls themselves the "Democratic Party": political party names make no sense.
Read up on them yourself.
http://www.puertoricousa.com/english/pnp.htm
They’re for “social Justice” and getting their “fair share” of federal funds.
They sound like marxists with a thin veneer of conservatism.