President Joe Biden quietly campaigned for Vice President Kamala Harris in Pittsburgh alongside Pennsylvania Sen. John Fetterman. Biden's trip was announced with very few details shared and was left off the campaign's 'day ahead for Saturday' list. Despite his low approval ratings and propensity for gaffes, Biden received a positive reception from union workers and volunteers in Pittsburgh. Pennsylvania is a must-win state for Harris or former President Donald Trump, with Fetterman predicting a tight race. Biden's limited campaign events in swing states differ from past campaign cycles.