But this from the article:"U.S. House Speaker Nancy Pelosi has said that status legislation needs consensus among Puerto Rican Democrats in the House in order to move forward."... with the House leader Pelosi saying she will not support the bill if there is not a full support in Puerto Rico for it then it might not be considered.
I believe that is what she meant: "If all three of the House members who are of Puerto Rican heritage don't support it, I won't call it up for a vote."
At least two of the House Representatives publicly support a constituent assembly (the position supported by the PPD) rather than a referendum (the position of the PNP.) Of course, the Speaker of the House has the power to keep a bill off the floor for a vote.
So, it appears that one of three particular members of the House can keep this coming to a vote. And Populares in Puerto Rico provide a LOT of campaign funds to those representatives.
So, you could write your congress member or the Speaker, but you have available a more direct alternative
You should write the German president of the Puerto Rican Senate and ask HIM to introduce a bill for the Referendum. You should write the the Republican Speaker of the House of Puerto Rico and ask HER to introduca bill for a Referendum. The bill in the US House of Representatives requires the government of Puerto Rico to pay for the referendum anyway.
The bill in the Puerto Rico legislature could state it: Do you want to be a State of the United States or do you want to be an independent country? That's as about as stacked as the question could be, because there are other alternatives. The PNP currently has so much power it doesn't even HAVE to offer these alternatives.
The PNP controls the Puerto Rico legislature and the governorship. They could arrange a referendum in Puerto Rico WITHOUT any assistance from the Populares. BUT THEY WON'T! This vote will NEVER take place because the PNP doesn't want it to take place. If they did, it could have already been scheduled.