In his presentation at the Arms Control Association Annual Meeting, Joe Cirincione concludes, "There are four main obstacles that could prevent President Obama from transforming U.S. nuclear policy."
Links
[1] https://ploughshares.org/file/763
[2] http://www.ploughshares.org/news-analysis/blog/obstacles-and-prospects-reducing-nuclear-threats-over-next-year
[3] http://www.armscontrol.org/node/3672