(Bloomberg) -- The US presidential field has narrowed considerably, but the fundraising amounts are growing as major donors — including Paul Singer, Timothy Mellon, and Ken Griffin — pour millions into the 2024 election.Most Read from BloombergTrump Risks Losing More Than Half of Swing-State Voters If Found GuiltyMusk’s $55 Billion Pay Package Voided, Threatening World’s Biggest FortuneS&P 500 Has Its Worst Fed-Decision Day Since March: Markets WrapHouse Passes $78 Billion Business, Child Tax Br