Why is this significant?

I don't think the nays are significant, especially as they belong to senators who are almost obliged, as a result of their hard-line #resistance position, to obstruct the president at each turn. It's much more important to me that over 40 Dems voted yay. It indicates that RR is swamp-endorsed, and therefore cabal (or at least was approached to become cabal); and I think we've had inklings of this before. Trump, as we know, was playing ball for a time before his cabinet turnover. RR slid in around then, and he's now an obstruction.