I had a person all me from the Federal Government in Washington, and is name was Nelson Miller ,  I asked him not to call and to take me off of whatever list my number was on. He then said F#!$ You and babbled something in his own language so hung up...

Calls originate in India and Pakistan.  They spoof local numbers.   Invest in a call blocker and do NOT pick up on call numbers you do not recognize.  Might be a good idea to block the entire 202 area code.  Scammers love to use that area code.