Election day is next Tuesday for many people in the US.
The laws dealing with voter identification requirements vary from state to state, and you should be aware of exactly what the requirements are for your particular state .. information which is handily provided for all states right here.
In my state (CT), the law states clearly that a photo id is not required .. there are some specific requirements which apply to newly registered voters and voters who have moved to a new area, but once you've voted at your precinct once then the requirements are pretty relaxed.
The way it reads to me, a previously identified voter is only required to show something printed by a bank or government agency which shows the voter's name, and either a photo, and address, or a signature. Sounds like a credit card might be enough (but I'm going to verify that with the SoS).
So when we've voted in our town in the past, the little old registrar ladies always ask specifically for a photo id. Last year I questioned them a bit, but my partner made me stop and we showed them our driver's licenses and voted. This year my partner has been radicalized a bit more (by reading this site) and is suggesting that we push the limit a bit and refuse to show picture id, rather bringing along other documents as specifed in CT §9-261 .. like a bank statement or a utility bill (or possibly a credit card).
It wouldn't be a bad idea if everyone read up on their applicable laws (see website above the squiggle) and pushed back a bit next Tuesday given the inclination these days to make it harder on voters ..
1:15 PM PT: a good summary h/t KLS:
Bring along a copy of the applicable state law printed from the state web site. Courteously demand your right. Know your state's law regarding audio or video recording and record if lawful. If your right to vote is denied contrary to your state law, courteously demand that an election supervisor at county headquarters (or whomever is above the poling place supervisor) is put on speakerphone. Write down the names of anyone who denies you your right and follow through with lawful action against them. If the police are called, great, courteously and without disruption show them the state law and demand your right to vote according to state law. Do NOT accept a provisional ballot unless that is exactly in accordance with law.