Don't start sewing that extra star to the flag yet. Even though the Government of PR is a Republican-leaning government (Governor, Nonvoting Representative in Congres). The Representative which caucus with the Republicans decided it was the right time before the elections. to do this. They quote the last referendum in PR which went for the first time for statehood, except most people refused to vote and stayed home, which could be the reason Congress turns them down, which will have an enormous impact in the relationship of Puerto Rico and Washington DC. It will have aftershock which will not be seen right away but this would be a staved in the back after being promised that Puerto Rico could decide its own destiny. Commonwealth, Independence or statehood.
The Republican government of Trump and his allies in Congress could not care less about Puerto Rico or any Hispanics for that matter whether they are American citizens(PR) or wishing to be(South Americans). Their eyes are in making Trump happy with their eyes, ears, and mouths close until this year passes and they find out whether they are still in the government or not. All their energies are going into getting another Trump justice and tilting the court for decades to come which really it could be a game changer with settle law being revisited and losing this time around because the court is stock against everything that had been done for the benefit of the many in the past 30+ years.
[This is how Justice Kennedy was asked to retired and when to retired by Trump]: