It was a busy day at the Chester County Government Center in West Goshen Township, as hundreds of people arrived to drop off their mail ballots on Monday.

Pennsylvania voters are almost sure to play a pivotal role in the Nov. 5 general election, with control of the White House and both chambers of Congress and the state Legislature in the balance. With its 19 electoral votes,

The most common disruptions at precincts are late openings, lack of staffing and voting machine issues, according to Jeff Greenburg, a 13-year election director veteran. He is now a senior advisor on election administration for The Committee of Seventy, a nonpartisan organization focusing on engagement and public policy advocacy.