If this were polarized, it would mean that no senator could risk offending their base by opposing it. They wouldn't budge in the face of popular outrage.
Since it's bipartisan, it means neither party's base badly wants it to pass (which we would already suspect from our own personal experiences).
I'd say this is actually pretty partisan if you ignore the mostly imaginary lines between the parties and think in terms of establishment vs. non-establishment.
