If I did a BPS authorised doctorate in Clinical Psychology in the UK, how could I transfer it over to America?

I'm in college at the moment, and I'm hoping to do a 3 year Psychology degree and then a doctorate in Clinical Psychology for another 3 years. This will hopefully be with the University of Hull, a BPS authorised university. My question is, if I wanted to emigrate to America immediately after I finish my doctorate, how could I be a chartered Clinical Psychologist in America?