This might be a moot question - but why do you want Dominican citizenship? I've been married to a Dominican for over 33 years, but I will never get a Dominican passport, which would be a rather simple process for me, because I've been warned that if I do that and have any sort of problem there, the US Embassy cannot help me. It seems if you carry both passports, their hands are tied if you're on Dominican soil.
If I'm wrong, someone please correct me!
AE