I do not answer calls from callers I do not know, so I let this go to the answering machine.
They did not leave a message so I am blocking this number.
I am on the do not call list but that only works for legitimate businesses, so this is most likely a SCAM.

My caller id logs blocked calls.  So far I got four calls in two days.

Do not answer this it's a political call that says
It's exempt from federal an state do not call lists.....BS!  Nobody is exempt
Block it and then set robo to call it every hour on the hour.

should always know what one is posting before making oneself look the fool.

https://www.consumer.ftc.gov/articles/0108-national-do-not-call-registry
"If I register my number, will ALL unwanted calls stop?

No, the Do Not Call Registry prohibits sales calls. You still may receive political calls, charitable calls, debt collection calls, informational calls, and telephone survey calls.

In addition, companies may still call if you’ve recently done business with the company, or if you’ve given the company written permission to call you. However, if you ask a company not to call you again, it must honor your request. Record the date of your request."

Um, yes, it is exempt. Did you not read what the DNC covers when you signed up for it?