Passage: In the United States, different states are able to set their own minimum wages independent of the federal government. When the state and federal minimum wage differ the higher wage prevails. As of January 2018, there were 29 states with a minimum wage higher than the federal minimum. Washington has the highest state minimum wage at $11.50 per hour. A number of states have also in recent years enacted state preemption laws, which restrict local community rights, and bar local governments from setting their own minimum wage amounts. As of 2017, state preemption laws for local minimum wages have passed in 25 states.

Question: Based on this passage, who has the highest minimum wage in the usa?
Steam of consciousness below:
To answer the above question, the relevant sentence is: Washington has the highest state minimum wage at $11.50 per hour.
So, the answer is Washington.