I think that it is more probable than not to raise it to $15, but what how will that help the country? It is not the hourly pay that is the real problem, it is the loss of jobs for the working class that started leaving the country several decades ago.
In a socialist country one size fits all, but in the US the country was created to allow anyone to become the president of the US or Boeing. But as education has failed us, along with the mergers and acquisitions of the small to medium businesses disappearing there is little work left for the working class.
In addition, the oil manipulation by the Middle East and their oil shortage in the 70s broke the back of Detroit and the working class, as our advantage in that industry went to Europe and Asia.
We have never recovered from that manufacturing loss, and today even China is building a car, as well as India. These are not great cars, but remember neither were the Korean, Japanese, and Europeans cars in the 70s. Look at them today!
!5$ as a minimum wage will just become the new poverty level.