Which brings us to the question: when will the USA take this step?
In our Federal system, states have determined individually the rules regarding the issuance of marriage licenses. Nine states, plus the District of Columbia, current permit same-sex marriage. The recently-argued case of Hollingsworth v. Perry places the question squarely before the Supreme Court of the United States (SCOTUS). However, it is not clear to me that SCOTUS will make a broad ruling legalizing same-sex marriage nationwide. It seems more likely that SCOTUS will simply take the view the each state is entitled to determine the issue for itself. In other words, SCOTUS will probably not announce a broad, universal right to same-sex marriage throughout the USA. They could, but I view the prospect as unllikely. Finally, SCOTUS could avoid the question entirely by saying that the Hollingsworth case should not have been brought to the Supreme Court in the first place. A decision is expected before 30 June 2013.
If you have question related to same-sex marriage and immigration, please feel free to contact my office for a consultation. –jcf