Former vice president and presumptive nominee Joe Biden, who was born and raised in Pennsylvania, won the primary with more than 79% of the vote, earning another 151 delegates and helping him to cross the necessary majority of 1,991 delegates and officially win the Democratic nomination three days later during the vote count.

Due to the COVID-19 pandemic, on March 27 Governor Tom Wolf signed a bill postponing the primary to June 2 as Pennsylvania, Rhode Island, and Indiana did the same, while the three other states selected different dates.

[3] They voted alongside these three postponed states and four regularly scheduled contests in the District of Columbia, Montana, New Mexico and South Dakota.

In the closed primary, candidates had to meet a threshold of 15% at the congressional district or statewide level in order to be considered viable.

[5][6] Voters chose district-level national convention delegates during the presidential primary, with no need for an additional confirmation by party bodies.