...do so, today, and urge them to support the change in rules (the nuclear option) that would shut off a filibuster with less than 2/3 votes. I just sent such a note to Sen. Graham, and hope he is paying attention.
Even if your Senator is not one of the 'on the fence' Senators, making your voice known will allow them to apply pressure on the squishy ones that don't want to have conflict with the other Senators.
The site to go to is here. Enter your state or Senator's name in the Search Box, and make your feelings known.