mascmuscle35 saidGuys he is not a US senator, nor is he a Republican
Roberto Arango-Vinent is a Puerto Rican politician who served as a member of the Senate of Puerto Rico from January 2005 until August 2011. Arango represented the New Progressive Party of Puerto Rico (NPP) as a San Juan district senator, before resigning in the wake of a nude pictures scandal
First half of your statement is correct, as he was the equivalent of the State Senate for the US Territory. As to the second half, however...http://www.huffingtonpost.com/2011/08/28/roberto-arango-puerto-rico_n_939714.html
HuffPostA graduate of Louisiana State University and a food importer before turning to politics, he was chairman of a business council for the national Republican Party and municipal director of the Republican Party in Puerto Rico, according to his Web page for Puerto Rico's Senate.
also from the same Wiki page you copied 'n pasted:
WikiActive in the Republican Party, he was the San Juan congressional district GOP committee chair and vice-chaired the George W. Bush/Dick Cheney Puerto Rico campaign in 2004. Within the NPP he was chair of its statehood ideological institute until he was removed for supporting Resident Commissioner Luis Fortuño's gubernatorial bid against NPP President Pedro Rosselló.
The NPP essentially exists to advocate for US statehood for the island. NPP members in Puerto Rico affiliate with both Republicans and Democrats in the US. However, Arango chose to affilliate with the GOP.