<p>"The US State Department – traditionally quite combative in its handling of dual-citizenship claims – has changed the way it handles these cases in recent years, and it is now much easier to retain such a status without a fight than it used to be. </p>
<p>The situation is slightly less clear for someone who becomes a US citizen via naturalization and still wishes to take advantage of his old citizenship. People who go through US naturalization are required to state under oath that they are renouncing their old citizenship, and conduct inconsistent with this pledge could theoretically lead to loss of one’s US status. </p>
<p>However, the State Department is no longer actively pursuing cases of this nature in most situations"</p>
<p>I would just put down US citizenship, not dual.</p>