The source is a memo directly from the Heritage Foundation: https://x.com/OversightPR/status/1805239354505257196

Here is the quote:

If the Biden family decides that President Biden will not run for re-election, the mechanisms for replacing him on ballots vary by state. There is the potential for pre-election litigation in some states that would make the process difficult and perhaps unsuccessful. Given the expected intensity of election integrity concerns in this election cycle, policymakers and the public should be educated and aware of the contentious path ahead.

Their reason for doing this is to fracture the vote, so that in some states people will literally be unable to vote for the replacement candidate. Given the 2020 election this would make it impossible for Democrats to win.

My question: will this work? Will states actually be unable to put the replacement candidate on the ballot if put under enough legal pressure? In many states the local leaders would probably work with HF to make this a reality.