What happens to the funds President Joe Biden has already raised toward his reelection? It's complicated.Biden's reelection efforts had raised a total of $240 million at the end of June. Those funds are split across the DNC, allied committees and Biden’s campaign committee itself. The latter alone holds $95.9 million as of the end of last month, Federal Election Commission data shows.Many campaign finance experts say that, should Harris become the nominee, any money remaining in the campaign’s bank accounts would transfer to her political operation because she already is part of the ticket.But some Republican lawyers disagree, arguing that under some interpretations, Biden and Harris must be formally nominated by their party before any money could be shifted."If President Biden is committed to passing the torch to his vice president, and wants to be able to seed her campaign with the current Biden for President campaign war chest, he’ll first have to become his party’s legal nominee," veteran Republican election lawyer Charlie Spies wrote in an op-ed in The Wall Street Journal earlier this month.On Monday, Harris' team announced that her campaign raised more than $81 million in the 24-hour period since Biden's announcement.The massive haul, which includes money raised across the campaign, the Democratic National Committee and joint fundraising committees, represents the largest 24-hour sum reported by either side in the 2024 campaign. Harris' campaign said it was the largest single-day total in U.S. history.If the Democrats go with another candidate, transferring that money would be tricky. Biden could move that money to the DNC, but the committee would be subject to FEC spending limits, which is just over $32 million for presidential candidates.He could also shift that money into a Political Action Committee (PAC), which would be capped at $5,000 donations to the campaign committees, but would have unlimited spending power on running its own advertisements. However, PACs are not allowed to collude with campaigns in any way, so the PAC’s spending could be heavily scrutinized. However, it would not be allowed to coordinate those spending activities with any of the candidates it supports.In short, the money Biden raised will not go to waste, but if the candidate is anyone but Harris, it will be hard to put all of it to good use.