The campaign also spent up to $20 million on swing-state concerts on the eve of the election, according to a report in the New York Post, a sum that could have been more if a planned performance by Alanis Morissette had not been scrapped.
The campaign had seven swing-state concerts on Monday, the report noted, including performances by Jon Bon Jovi in Detroit, Christina Aguilera in Las Vegas, Katy Perry in Pittsburgh and Lady Gaga in Philadelphia, and a 2 Chainz performance at a rally three days before the election in Atlanta.