2020 Democratic Presidential candidate, Joe Biden, and his wife Jill arrive at a campaign event in Burlington, Iowa on Wednesday, August 7, 2019. Biden is kicking off a 4 day tour of Iowa. Credit: Alex Edelman / CNP. 07 Aug 2019 Pictured: Joe Biden. Photo credit: Alex Edelman - CNP / MEGA TheMegaAgency.com +1 888 505 6342

2020 Democratic Presidential candidate, Joe Biden, and his wife Jill arrive at a campaign event in Burlington, Iowa on Wednesday, August 7, 2019. Biden is kicking off a 4 day tour of Iowa. Credit: Alex Edelman / CNP. 07 Aug 2019 Pictured: Joe Biden. Photo credit: Alex Edelman - CNP / MEGA TheMegaAgency.com +1 888 505 6342

2020 Democratic Presidential candidate, Joe Biden, and his wife Jill arrive at a campaign event in Burlington, Iowa on Wednesday, August 7, 2019. Biden is kicking off a 4 day tour of Iowa. Credit: Alex Edelman / CNP. 07 Aug 2019 Pictured: Joe Biden. Photo credit: Alex Edelman - CNP / MEGA TheMegaAgency.com +1 888 505 6342

2020 Democratic Presidential candidate, Joe Biden, and his wife Jill arrive at a campaign event in Burlington, Iowa on Wednesday, August 7, 2019. Biden is kicking off a 4 day tour of Iowa. Credit: Alex Edelman / CNP. 07 Aug 2019 Pictured: Joe Biden. Photo credit: Alex Edelman - CNP / MEGA TheMegaAgency.com +1 888 505 6342

2020 Democratic Presidential candidate, Joe Biden, and his wife Jill arrive at a campaign event in Burlington, Iowa on Wednesday, August 7, 2019. Biden is kicking off a 4 day tour of Iowa. Credit: Alex Edelman / CNP. 07 Aug 2019 Pictured: Joe Biden. Photo credit: Alex Edelman - CNP / MEGA TheMegaAgency.com +1 888 505 6342

2020 Democratic Presidential candidate, Joe Biden, and his wife Jill arrive at a campaign event in Burlington, Iowa on Wednesday, August 7, 2019. Biden is kicking off a 4 day tour of Iowa. Credit: Alex Edelman / CNP. 07 Aug 2019 Pictured: Joe Biden. Photo credit: Alex Edelman - CNP / MEGA TheMegaAgency.com +1 888 505 6342

2020 Democratic Presidential candidate, Joe Biden, and his wife Jill arrive at a campaign event in Burlington, Iowa on Wednesday, August 7, 2019. Biden is kicking off a 4 day tour of Iowa. Credit: Alex Edelman / CNP. 07 Aug 2019 Pictured: Joe Biden. Photo credit: Alex Edelman - CNP / MEGA TheMegaAgency.com +1 888 505 6342

2020 Democratic Presidential candidate, Joe Biden, and his wife Jill arrive at a campaign event in Burlington, Iowa on Wednesday, August 7, 2019. Biden is kicking off a 4 day tour of Iowa. Credit: Alex Edelman / CNP. 07 Aug 2019 Pictured: Joe Biden. Photo credit: Alex Edelman - CNP / MEGA TheMegaAgency.com +1 888 505 6342

2020 Democratic Presidential candidate, Joe Biden, and his wife Jill arrive at a campaign event in Burlington, Iowa on Wednesday, August 7, 2019. Biden is kicking off a 4 day tour of Iowa. Credit: Alex Edelman / CNP. 07 Aug 2019 Pictured: Joe Biden. Photo credit: Alex Edelman - CNP / MEGA TheMegaAgency.com +1 888 505 6342

2020 Democratic Presidential candidate, Joe Biden, and his wife Jill arrive at a campaign event in Burlington, Iowa on Wednesday, August 7, 2019. Biden is kicking off a 4 day tour of Iowa. Credit: Alex Edelman / CNP. 07 Aug 2019 Pictured: Joe Biden. Photo credit: Alex Edelman - CNP / MEGA TheMegaAgency.com +1 888 505 6342