Speaker Pelosi has introduced a bill to set up a commission to look into the Presidents capacity to carry out his duties. This would be a “kinder, gentler coup d’etat”. Doesn’t sound like the move of someone confidant in an upcoming election victory.
Since this presumably has to also pass the Senate, it thus qualifies as election-year showboating.
Of course Trump could conceivably declare the effort to be treasonous in light of his obvious health and sanity, and demand that everyone voting for this be arrested for treason and removed from office until the outcome of their trials.
We live in interesting times.