Hot Air has a post asking the above question. I’m not sure the Democrats would ask. Here’s why.
The closest historical example isn’t LBJ dropping out in ’68. He figured it out on his own. The proposed scenario is more like when Howard Baker and other Republican leaders told Nixon that his time was up.
Neither event saved the White House for the incumbent party. It’s one thing when a new leader emerges to take the reins of a party. It’s something quite different when the party throws their leader out.
As the bureaucrats who review loans might say, the optics aren’t good.