"Another point of view is that since the majority leader runs the Democratic caucus, that person has a responsibility to support and defend the caucus’ positions."

I call B.S.!  She has the responsibility to vote the way the people she represents would want her to.  Kudo's to her for doing so.  We already have too many puppets in our government.

Saiki said there are two “schools of thought” 
 yeah, first one is to vote the way your people want, and the second is to be a puppet.