The bridge collapse — which caused no fatalities but prompted rescuers to form a human chain to retrieve people from a precariously perched bus — offered Biden a striking example of what he has declared is an urgent need for investments in the country's infrastructure.
The bridge collapsed hours before President Joe Biden was to visit the city to press for his $1 trillion infrastructure bill, which includes bridge maintenance.
Pittsburgh's incumbent mayor conceded the primary election Tuesday to challenger Ed Gainey, who would become the city's first Black chief executive if he wins the general election in November.
The mail-in ballots could make a difference in the 45th state Senate District race, where incumbent Democrat Jim Brewster and Republican Nicole Ziccarelli are separated by a few thousand votes.