Who called from 2028481518

Who is this? I don't know anyone in 202 area code.

Looked up on Intelus and it said the number appeared to be invalid.  The person used my first name.

For clarity: the caller from this number called me by my first name, "Hello, SMS?"  The man called three times, so I looked the number up, just in case.  "appears to be an invalid number"
202 is D.C.  I have a few friends there, but this number isn't one of them.

Senate conservatives fund.  Called on my cell phone number which until now has received fewer calls than the house phone.  No action, no money, no answer.  Blocked.

Voicemail. Claims to be a conference call with conservative senators.