I am a citizen of two countries, Uruguay by birth, and Italy through my paternal grandfather and father. I have passports from both. I have been living in the US for 20 years, first as a H1B holder, and more recently as a Green Card holder. My GC expires in two years, and instead of renewing it I am considering becoming a US citizen. I would like to know how that would impact my other citizenships. Any clues?