The PNP and Luis Fortuño is roughly equivalent to the Republican Party, kind of.
Yes, although unfortunately Pedro Pierluisi, the PNP successor to Fortuño, is a Democrat, and not just any Dem, but a HUGE Obamabot. So you have two Democrats running against each other for Resident Commissioner in the general. :-\
While for most of the 20th century the pro-statehood party in Puerto Rico was affiliated with the national Republican Party, the current pro-statehood party, the New Progressive Party, is, by design, not affiliated with either national party (its founder, Governor Luis A. Ferré, was the national Republican Party leader in Puerto Rico for over 50 years but knew that statehood could not be achieved by excluding Democrats). In general, the NPP is more conservative (and is certainly more pro-business) than the pro-”Commonwealth” Popular Democratic Party (which has long ties with national Democrats), and NPP gubernatorial candidate Luis Fortuño, currently Puerto Rico’s Resident Commissioner in Congress, is a pro-life Republican (he was a co-sponsor of Duncan Hunter’s bill to use Section 5 of the 14th Amendment to define “person” as any human being from the moment of conception, which would make abortions violations of the Due Process Clause of Section 1 of the 14th Amendment), and has been the Republican National Committeeman from Puerto Rico since before his election to Congress.