More register as Democrats in Pa.
I was listening to the Harrisburg, Pa., public radio station, WITF, and they were reporting that some 65,000 voters had changed their registration to the Democratic Party for the April 22 primary. Of those, 42,000 came at the expense of the Republican Party and the rest, presumably, were independents who wanted to be able to vote in the primary. The deadline for switching or for new registrations is March 24 if you want to vote in the primary.
Pennsylvania, unlike some states, has a closed primary. That means only Democrats can vote for Democrats and only Republicans for Republicans. There are good arguments for and against a system like this. It prevents voters from one party from making mischief in the nominating process of the other party, either for malicious reasons or because they're bored with their own party's primary. But it denies people who don't want to affiliate with either party any role in the nomination of the candidates who will hold important offices.
It's really six of one and a half-dozen of the other.