The potential for constitutional crisis in the 2024 election is one of the low-probability but extremely worrisome problems that still isn't being taken nearly seriously enough by people who could do something about it.

‘Terrifying for American democracy’: is Trump planning for a 2024 coup?
Republicans are vying for critical positions in many states – from which they could launch a far more effective power-grab than Trump’s 2020 effort
theguardian.com