Monday, March 28th was the last day to change parties in Pennsylvania or to register to vote in the presidential primaries. Those waiting until the last minute had until midnight by going to register.votespa.com
As of March 21st, there were 4,011,640 Democrats registered in our state and 3,058,531 Republicans. Nearly 55,000 Pennsylvania voters switched from Democrat to Republican this year, about double the number that switched from Republican to Democrat. There are about 680,945 voters with no party affiliation.
Link to find your polling place