Sanders has the donors, Biden leads polls in Tuesday primary states

Sen. Cory Booker (D-N.J.) endorsed former Vice President Joe Biden on Monday in Michigan. (Photo by Mandel Ngan/AFP via Getty

Democrats spent over $1 billion on failed presidential bids

Democrats after an early debate in 2019 (Joe Raedle/Getty Images) Two billionaires and two dozen hopefuls who dropped out of

Will donors to Cory Booker move to other 2020 Democrats?

Sen. Cory Booker (NICHOLAS KAMM/AFP via Getty Images) Sen. Cory Booker (D-N.J.) shares thousands of donors with several presidential candidates,

Castro, Booker have highest proportion of contributions from Iowa women

Julian Castro, former housing secretary (left) and Sen. Cory Booker (D-N.J.) each receive more than 60 percent of their Iowa

How are presidential candidates spending their campaign cash?

Elizabeth Warren spends more than any of her fellow 2020 presidential candidates on salaries (Sean Rayford/Getty Images) Campaigning for president