Honestly, I don't understand how this article and so many people can consider it OK for government officials to hold dual citizenship. This is especially not OK with regard to Israel because regardless of how you view Israel it is a very polarizing issue. Decisions made here in the US are sometimes for benefit of the US or the benefit Israel but not both. Where do the loyalties of those who hold dual citizenship lie at the point of conflicting interests? I believe for some US  dual citizen Jews in government, their identity is tied tightly to Israel and if it comes to a choice of what's best for Israel or the US then the US will not take priority. Why take the risk? If you want to serve in the US government then renounce any other citizenship and make clear your loyalties. If you want to be a dual citizen then you are disqualified from serving in the US government.