One of the questions that you might have would be what the USCIS processing time for Dominican Republic might be as far as tourist visa applications are concerned. It is difficult to give you an exact time period that it would take for Visa applications as a number of factors contribute towards a successful application.
There are different ways of applying for a visa to the USA as you could be applying online or through a consular centre or even through an agent depending upon what your preference might be together with whether or not you are willing to spend money towards legal advice as well as guidance through professional counselors.
The best way to find uscis processing time for Dominican republic for different visa categories would be by checking with your local US embassy as they will have statistics and records that they would be sharing with you to help you proceed further.
An alternative way would be by getting in touch with experienced and well established USA visa agents who can facilitate things for you by acting as a bridge between you and the application centre. They have no role whatsoever in the outcome of your application but they can very much assist you based on their experience on submitting your application correctly and meeting all requirements to improve your chances of getting approved for a tourist visa.