I had to answer "I don't know," Chas.
I honestly, and with good cause, think this is a question not given to an easy answer. Other than for insiders like yourself who might have access into the minds of certain legislators, all we citizens have to answer such a question is observing (1) what a legislator says, and (2) what he or she does. The broader question is whether or not those two factors are reliable insofar as our making a decision on the question asked here is concerned?
Time and again, both in Austin and Washington, DC, we have seen legislators voting against a proposition we were convinced they favored, and voting for a proposition we were convinced they opposed. Too many rational, and sometimes irrational, factors go into a legislator's votes, other than their personal likes or dislikes. I would submit that the current situation on Capitol Hill demonstrates this quite well, regardless of one's personal views.
To further complicate the issue a typical state or federal legislator is faced with that long-standing dilemma faced by legislators and elected leaders of all sorts in a republican form of government: Is his or her task to vote as he or she feels is correct, or is it to vote as he or she feels his or her constituents feel is correct?
I suspect the truth is that it is a mix of the two, making predictions very difficult.
Likewise, whether or not any particular legislator, state or federal, truly understands an issue is sometimes lurking in the background.
We're not going to reason people out of positions they haven't reasoned themselves into, to paraphrase Ben Franklin.