Joe Biden’s decision not to run for reelection leaves the Democratic nominee that replaces him with an unprecedented challenge: running a successful presidential campaign in under four months. That will take a lot of money.  On today’s Big Take podcast: How much could that campaign cost? Gregory Korte and Laura Davison, who cover money and politics for Bloomberg, dig into that question, Kamala Harris’s fundraising edge and how Democratic donors are reacting to the news. Read more: Joe Biden Bows to Democrats Who Wanted Him Out, Upending US PoliticsSee omnystudio.com/listener for privacy information.