The Biden administration has pushed social media giants like Facebook to curb Covid misinformation. But it is thriving on fringe platforms like Gab, a hub for extremist content.
The G.O.P. candidate for governor, who promotes Christian power and disdains separation of church and state, is alarming Jewish voters in his contest with the Democratic candidate, Josh Shapiro, who is Jewish.
The founder of Gab, a far-right social media network, recently made bigoted remarks defending his ties with Mr. Mastriano, the Republican nominee for governor of Pennsylvania.