I am watching this too, but not so worried as I think it's going no where but with these politician you never know.
I'm wondering how this might affect my wife. Around the time she got her US citizenship she needed to renew her Russian passport. Sent off to the Russian embassy in DC to have them renew it for the second time. Unfortunately her internal passport was also expired and not renewable in the US. After several months the embassy let us know they could not renew her Russian passport without extra money and a special search of her history and work background from Russia. We sent the money and waited. Again after a few months they said they could not renew her passport even though they had renewed it 5 years prior, saying they could not determine she was a Russian citizen! I was concerned how this would interfere with her ability to visit her family and friends in Russia and if she would even be able to obtain a visa to Russia in her US passport. While she was on the phone discussing this with someone at the embassy I had her ask them since they cannot determine she is a Russian citizen can they say that she is NOT a Russian citizen (opening up the possibility that she CAN get the visa to Russia) and their reply was "oh, if you want to renounce your Russian citizenship you need to fill out XYZ form and send us X$ and your CURRENT VALID Russian passport". We just gave up.
So the question is, is she actually a dual citizen? She never renounced her Russian citizenship.
I assume if this bill succeeded it might just require a form and attestation here in the US.