The Trumpers in the Senate aren't even pretending to care. They aren't paying attention reading books with their feet up on their desks.
They don't have to care about this vote, but they probably do care whether their dump base will be able to carry them in their next election, because this 1/06 shyt is apparently causing Rs to jump ship in big numbers. Not sure I believe that will be a big factor in 2 or 4 years, though.