The author said “partisan”. The unicameral Nebraska legislature is nonpartisan.
Then the author excluded Nebraska from the tally of 98. You are correct then, it is 99 state legislative chambers and of those 2/3’s are needed to make application for an Article V process.
However, must the two chambers of a bicameral state be in agreement?
For a bicameral state, I would think both chambers are needed to make application for their state. Or is it just state representatives that make application? Or can it be one or the other, either state senate or state representative body?