they let the phone ring 2X and then hang up. no messages. this is a spoofed number. If you call it back you get a message "Sorry this is not a recognized phone number".
They're BAAACK!!! Found on my Verizon Voicemail: Massachusetts Women Voters (or some such mumble), with a pre-recorded message on behalf of Katherine Clark, democrat, running for House seat in Massachusetts 5th district special primary, Tue 15 Oct. Also calling from 617-826-6010 (and probably lots of other numbers).