since no one has responded yet to you, i will.
I have to warn you, this is my personal opinion only and doesn't mean much other than it's my thoughts on what would be reasonable, so I suggest you take this just as someone persons opinion on a board and that's it.
As you are no doubt aware, 1 DUI poses problems.
Therefore 2 obviously will present some challenges as it relates to "moral turpitude". You will find it harder to present a case that your husband simply made a mistake as there is a clear pattern here.
Additionally, what are the circumstances around the DUI's as this could pose more problems. Were they simply a "garden variety" DUI, i.e. say he blew a .08-.12? Or did he blow .16 or higher? was there an accident involved? were there injuries? What were the results of the court, especially the second DUI, and how much jail time did he have to serve?
The upside, is that it's been 7 years as this should play in his favor to demonstrate he has "ammended" his ways. Better yet if you can document attendance at a sober living facility, Alcoholics Anonymous or some other on going treatment along with demonstrated evidence of sobriety.
So yes he can "apply", and he may or may not get his citizenship. The best thing he can do is strengthen his case with things like the above and I would find an immigration lawyer that can demonstrate to you that he/she has successful experience in dealing with DUI related issues.
