Does Congress repeatedly re-voting on the same thing, knowing that it will never pass, just to score points against your opponent actually work?

I noticed this morning that the Republican party had once again forced a vote on the Iran deal knowing full well that it would fail. The article even states this and says that they did it “to make political points against Democrats and in future Senate races”. There is a third vote in the works that will end with the same result.

Does this really make a difference in the real world?

If a politician says that his opponent voted against a measure three or four or fifty-two times who comes off looking stupid, the opponent or politician for proposing it so many times?

Does repeatedly voting on the same thing over and over (and not even expecting different results) make you any more right in the eyes of those who agree with you or any less wrong in the eyes of those who don’t?

Is it not obvious to the electorate that it is/was only a political ploy?

Is it ever going to sway someones vote or does it just mollify the base?

Is it just so much preaching to the choir?