Maura Johnston on why calling Michele Bachman a “lyin’ ass bitch” on national television doesn’t help anyone at all.

“Bachmann is the first 2012 GOP presidential candidate to be on Fallon, although she’s certainly not the only one who’s been caught in her own deceptions. She’s also the lone woman remaining in the field, which makes me wonder if Rick Perry or Rick Santorum would have been greeted by this particular Fishbone track had they …