What has been stopping Puerto Rico from becoming a state between 1898 and 2015?

Answers

ocularnervosa

Puerto Rico has the right to decide their own fate. They can break away and form their own country, they can apply for statehood or they can remain as is. In the end they always vote for the status quo.

Max Hoopla

Lack of interest in changing its status.

Greg

The people in Puerto Rico voted against it.