The real issue here is why convicted felons who are/were members of Congress still receive bloated pensions.
same reason Obama won't prosecute any of the Bush-era torturers: "because that could be me some day, better not make the rules too tight"
Nixon probably would have held on til the bitter end were it not for the pension issue. he'd have been stripped of all his benefits were he impeached.
if you think Pelosi will be the one working to get Grimm expelled you really don't understand a damn thing.