Is Puerto Rico the 51st State of the U.S?

Although Puerto Rico has been considered to be the 51st state, it is a commonwealth of the United States. After the Spanish-American war, Puerto Rico became property of the U.S. According to Wikipedia, in 2012 54% of the population expressed dissatisfaction with the current political relationship. In another question, 61% supported statehood. On January 4, 2017, Puerto Rico's representative to Congress pushed a bill that would make P.R a state by 2025. Is it true? We have to see to find out. June 11, 2017, another vote was held and 97.7% of the population supported statehood.