Getting daily calls from this number or others on the list Chris posted above. It's obviously a robo-call. They are clogging my message system with hangup calls. I seldom answer the phone unless I know who it is. What a nuisance!
Likely yet another number being used in the robo-call scam where they try to make you believe that they are calling in support of a political candidate or cause, then ask for contributions to support whatever it might be. If they do succeed in getting money (or identity information) it all goes to the scammers. The politicians or organizations that they claim to represent likely have absolutely nothing to do with these calls and don't receive a penny's worth of benefit -- directly or indirectly -- from them.
I've been receiving multiple of these calls daily, all with a caller ID name of "Washington D.C.", but the supposed (spoofed) calling numbers usually vary from another.