If you are concerned about a replacement of RBG being made before the election, I urge you to call your senator first thing tomorrow and advocate for waiting to vote on Ruth Bader Ginsburg’s replacement until after the election is over.
Then do it literally as often as you can/want to.
You can find your senator’s number here.
And here is an excellent article on how to have a productive conversation with your legislator’s office, regardless of the issue.
Godspeed. Dissent with fervor.