Senate rules require a majority of senators (51) for a quorum.
The Dems have that, unless several Dems are absent.
“Senate rules require a majority of senators (51) for a quorum.”
And “At this point in time, what possible difference could it make” for any Republicans to show up or not? If they don’t show or only vote present anything that is passed is on the RATS so that they can reveal their true selves.