Not a bad question, responds a Birther.
I’ve never heard of it before.
Although, to be clear, she was born in the US, to two US citizens, and never renounced her US citizenship. The dual citizenship was conferred on her at marriage - and not all countries do that.
I wonder how much time she spent in Switzerland? Couldn’t have been much more than a bunch of short visits, if that much. All those children and foster kids would have made travel prohibitively expensive. :)
This issue would have come up in the background check for her Committee assignment.