It seems as if a great number of people in powerful position have dual citizenship. How is it even possible for someone to have dual citizenship in the first place. The oath starts out....
"I hereby declare, on oath, that I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty, of whom or which I have heretofore been a subject or citizen"
https://www.uscis.gov/sites/default/files/document/n-400-topic-exercises/The-Oath-Of-Allegiance.pdf
Doesn't that mean that they are no longer a citizen of their previous country? It's become clear that that's not what they think. I think that we should make it illegal for anyone that is not a natural born US citizen to hold ANY political office including state and local level offices. I think they have sufficiently demonstrated that they cannot be trusted to put the needs of the US first.
I put a link to that page in case you wanted to read the rest of the oath. As far as who has dual citizenship, it comes from reading hundreds of articles. I don't know of a complete list. Just keep your eyes open for them now that you're curious. You'll find them everywhere.