

One key to Biden's success in the state was his improvement on Hillary Clinton's margins in the large Philadelphia-area suburban counties: he won Bucks by 3.60% more than Clinton did, Delaware by 4.38% more, Montgomery by 4.80% more, and Chester-which Mitt Romney had narrowly won just eight years prior-by 6.60% more. The following morning, November 7, during a Trump campaign press conference outside a Philadelphia landscaping business, nearly all major news organizations followed suit and called Pennsylvania for Biden, proclaiming him President-elect. On the morning of November 6, election-calling organization Decision Desk HQ forecast that Biden had won Pennsylvania's 20 electoral votes, and with them the election. However, over the next few days, Biden greatly closed the margin due to outstanding votes from Democratic-leaning areas, most notably Philadelphia and Pittsburgh, as well as mail-in ballots from all parts of the state which strongly favored him.

Because of the way the state counted in-person ballots first, Trump started with a wide lead on election night. Īlthough Trump had won the state in 2016 by a narrow margin of 0.72%, Biden was able to reclaim the state, winning it by a similarly narrow 1.17% margin.

Pennsylvania has 20 electoral votes in the Electoral College. Pennsylvania voters chose electors to represent them in the Electoral College via a popular vote, pitting the Republican Party's nominee, President Donald Trump, and running mate Vice President Mike Pence against Democratic Party nominee, former Vice President Joe Biden, and his running mate California Senator Kamala Harris. The 2020 United States presidential election in Pennsylvania was held on Tuesday, November 3, 2020, as part of the 2020 United States presidential election in which all 50 states plus the District of Columbia participated.
