Schatz one month ago, to Isaac Chotiner, on how he'd stand up to Republicans:

"... for the next couple of weeks they don’t need us at all, and then for the rest of the year they’re going to need us for several things, such as the budget and the debt ceiling."

https://www.newyorker.com/news/q-and-a/do-democrats-have-a-plan-brian-schatz