That is the huge question. I think that in fact we are in a perilous situation.
What needs to happen is for Biden to have a forced mental status exam and the results made public. If the results turn out the way I suspect they will, then Kamala Harris can take over, and we can see how she handles the job. I'm sure that would encourage others to throw their hats in the ring.
We also need a serious challenger to Trump on the Republican side.