In a little-noticed vote last night, after many failed attempts, Puerto Rico voted to officially join the United States as a full state: The two-part referendum asked whether the island wanted to change its 114-year relationship with the United States. Nearly 54 percent, or 922,374 people, sought to change it, while 46 percent, or 786,749 people, favored the status quo. Ninety-six percent of 1,643 precincts were reporting as of early Wednesday. The second question asked voters to choose from three options, with statehood by far the favorite, garnering 61 percent. Sovereign free association, which would have allowed for more autonomy, received 33 percent, while independence got 5 percent. The issue now moves to Congress. President Obama has promised to respect the wishes of such a vote, and both party platforms for this year agree. Gerald Ford , George Bush I , and even Reagan supported statehood. The trouble in Congress could come if some troglodyte adds an amendment forcing