This is what I call for in another comment. There's no way to get a supermajority in the Senate, so the legislative filibuster would have to die.
While your comment is both technically and strategically correct, this sort of binary "us vs them" mentality has caused america such harm and always strikes me as somewhat reductionist. I wish more focus would be on policies and individuals instead of D vs R (as if greens, libertarians, socialists, etc simply do not exist in america's 300M+). Perhaps i am just romanticizing an impossible future, though.
I'm of the opinion that a first past the post and winner take all voting system will almost always produce a 2 party outcome. As such, until we change the voting system I've decided to stop considering myself independent and throw in with the party most closely aligned with my views.
I don't think your imagined future is impossible, though! I just think it's heavily discouraged by our voting system. We can change our voting systems, though. I'd really strongly encourage you to check out and support Ranked Choice Voting (or other proposed voting systems). I don't think it's a silver bullet, but I think RCV would go a long way to breaking down the 2 party system
The only other option to pass such a bill in the Senate would be to gain a Senate majority and use that Senate majority to end the legislative filibuster, which is the last filibuster anyways. With the filibuster out of the way, we'd just need the presidency and majorities in both houses of Congress.