President Trump and former Vice President Joseph R. Biden Jr. crisscrossed two key Northern battleground states on Saturday in a string of campaign stops with Election Day just three days away.
Mr. Trump had four rallies planned across Pennsylvania, beginning with one in Bucks County and ending in Montoursville, while Mr. Biden appeared in Flint, Mich., with plans to visit Detroit later.
The two states were part of the so-called “Blue Wall” — Michigan, Wisconsin and Pennsylvania — that have leaned Democratic in recent national elections but which were crucial to Mr. Trump’s victory…
