BREAKING: Bernie Sanders to register as a Democrat

[mak3cats]

82. No, the October 9th deadline is for those already registered to vote,

but not registered as Democrats. That is the last day to switch party affiliation (or to add an affiliation, if you didn't indicate one at the time of registration).

From the NYS Board of Elections website:

http://www.elections.ny.gov/VotingRegister.html

Change of Party Enrollment

The voter registration form should be used to change your party enrollment from one party to another or to enroll for the first time in a party. A change of enrollment received no later than 25 days before the general election shall be deposited in a sealed enrollment box and opened the first Tuesday following that general election and entered in the voter's registration record.

2016's registration deadlines aren't even on the website yet, but I believe state law is 25 days prior to the election in question (e.g., October 9, 2015, is the last day to register to vote for the November 3, 2015 general election). So for someone not registered at all, they have until sometime next March to be able to register to vote in the primary.