In 1821, a constitutional Amendment narrowly failed in the HoR, which would, if adopted, have mandated that States choose all but two of their Presidential Electors in Congressional Districts rather than at large.
So what happens in 1824? Afaics, Jackson and Adams will still be first and second (with neither getting a majority), but who comes third? OTL, Crawford edged out Clay by just four votes, but would he still? He could carry some districts in the Carolinas, but so could Clay in the West. OTOH Crawford might lose a few in Virginia and Clay in Ohio.
Could Clay come third, and go on to maybe win in the House?