From LYNN LANDES:
Bernie should be alerting his independent voters to change their registration to Democrat if they want to vote for him in the Pennsylvania presidential primary, as well as in other states. The independent voter is a huge group. Nationwide, 43% of all voters consider themselves to be independent according to Gallup – http://www.gallup.com/poll/180440/new-record-political-independents.aspx. Not sure what official registration figures report. Many independents may not understand the limitations of their registration status (depending on their state) and how that affects their right to vote for the candidate of their choice in the primary.
In Pennsylvania, voters must be registered Democratic in order to vote in the Democratic primary.
IN PENNSYLVANIA – Deadline Alert: 03/28/2016 is the last day to register before the 04/26/2016 Democratic Primary Election.
In order to change or select a party, you must submit a new application – https://www.pavoterservices.state.pa.us/Pages/VoterRegistrationApplication.aspx.
You can verify your “voter status” to make sure that you identify yourself EXACTLY like you did on any previous application –https://www.pavoterservices.state.pa.us/Pages/voterregistrationstatus.aspx. For instance, I looked up my status because I didn’t remember if I used my middle initial or not. Turns out that I did.
There are also deadlines for applying for and submitting an absentee ballot: http://www.philadelphiavotes.com/en/voters/absentee-and-alternative-ballots