Ominous development #1: Bank of America (and, apparently, only BofA) has started asking its customers whether or not they hold a dual citizenship.
Ominous development #2: The Trump administration is moving aggressively to strip U.S. citizenship from anyone who lied on their application, even if the lie was immaterial or inadvertent. The last time anything like that happened was during the McCarthy era.
Ominous development #3: The Washington Post published an op-ed by a former Trump administration official arguing that birthright citizenship is a "historical and Constitutional absurdity" and should be abolished. To defend this position he has to argue, of course, that the Fourteenth Amendment doesn't actually mean what it plainly says, what the people who wrote it said it says, and what everyone has agreed for 150 years that it says. But we've known for a long time that those who travel in Trump's circle have no qualms about rewriting history.
I think there's a quietly hatched plot somewhere deep inside the vast right wing conspiracy to eviscerate the fourteenth amendment and expand the government's power to strip people of their citizenship beyond all historical precedent. It is, of course, all based on lies, but that is just a standard part of the right's play book. They have used this strategy very effectively to move the needle on gun rights and abortion, so there's no reason to believe it won't succeed on citizenship.
Anyone who has any kind of paper trail linking them to another country should be very afraid. You may have a dual citizenship and not even know it. You may not even be able to renounce it once you find out.
My grandfather had no idea he was a Jew until the Gestapo knocked on the door one day and told him. This is how these things begin.