evidence: Even if Democrats did sweep in November, there are additional hurdles at play in the Senate. They'll need either 60 Democratic votes to overcome a Republican filibuster or 50 Democrats willing to vote to make an exception to the rule. [...] It's a tall order. Democrats currently have 51 Senate votes. They are expected to lose Sen. Joe Manchin’s seat in West Virginia, which puts them at 50. And Sen. Kyrsten Sinema, I-Ariz., is retiring, with Democratic Rep. Ruben Gallego vying for her seat. Gallego’s campaign told NBC News that he supports a filibuster carveout to codify abortion rights, meaning that it would need just a majority of votes. If Gallego replaces Sinema and Democrats hold the rest of their seats, they’ll have 50 Senate votes, all of which are in play to support the filibuster carveout to codify abortion rights.