"Leadership" can easily be defined to include Reid and Pelosi and no one else, if it suits their purposes to do so.  Given Morin's clear hostility to the question, I think you might have to picket his home to get him to budge on this.

Oh, and about "serious" presidential candidates. What do you want to bet that any candidate who raises impeachment will automatically be dropped from the list of "serious" candidates.

Circular logic--the logic of people in certain circles who go in circles, circle the wagons, and never circle you in.