I know. But I believe they would balk, hard, at being put on the record, in the form of a resolution, that dual citizens born on US soil are Natural Born Citizens.
The Senate had no trouble crafting a resolution that it thought would quell concerns over McCain's birthplace; it should have no qualms about crafting a similar resolution asserting its sentiment as to a person born a dual citizen. AFAIK, at birth, Obama had the (not yet mature, but inalienable) power to elect British citizenship. But still, as far as the Senate is concerned, dual citizenship is NOT a barrier, or disqualification.
I think there would be some political value in calling for a Senate resolution, again to "quell public concerns."
Someone had made a great point on another thread a few days ago...
If, during 1961 or 1962 (for example), the US was at war with Great Britain, the US government could have interned (or at the very least monitored) Barry as a subject of an enemy power.