It is Emily's List. It's a political organization to recruit female Democrats and ask for money. It's a good cause, but the constant calling is harassment and needs to stop. There is a reason people don't answer their phone no matter what time of day or evening. Gordon Schwen also shows on caller ID sometimes for this number. It's getting blocked now because the constant ringing of the phone is annoying.
I too am getting calls on almost a daily basis - my phone ID says the name is Gordon Schwenk (but it could be Schwenkman) - today my call came from 202-772-0021 but the number frequently is different but with the same caller ID.