How do you think most people in the US would like it if Iran had bases all long the Mexican and Canadian borders, in the Bahamas, a major fleet sitting in the Gulf of Mexico and another one just off the California coast? How do you think Washington, DC would react? What if Iran orchestrated an international embargo against the US, trying to cut off our oil supply? What if they flew drones over head all the time and periodically assassinated US nuclear scientists?
The link below shows some of the dozens of US military bases and installations which surround Iran and has an article about the situation: