This caller always calls with 2 calls:
First call displays NAT REP CON which I have blocked.
IMMEDIATELY after that call is blocked, a second call is made to my phone with caller ID: PRIVATE and the phone number is UNAVAILABLE. This also gets blocked, but I can see it in the logs.
This is repeated a couple times a day for days and days.
If you call the number back, you get a recorded voice stating "You've reached the customer service line for the NATIONAL REPUBLIC CONGRESSIONAL COMMITTEE."