The couple's fortune is mostly tied to public speaking engagements and book royalties, according to tax returns and financial disclosures
A spokesperson for Biden didn't immediately respond to a request for comment on Biden's net worth or personal life from Business Insider.Former Vice President Joe Biden is one of the leading 2020 Democratic presidential candidates. Former Vice President Joe Biden speaks during the fifth Democratic primary debate of the 2020 presidential campaign season in Atlanta, Georgia on November 20, 2019.of which candidate has the best chance of becoming the 2020 Democratic presidential nominee.Vice President Joe Biden waves as he walks out of Air Force Two with his granddaughter Finnegan Biden and son Hunter Biden at the airport in Beijing December 4, 2013.