This link goes into more detail:
https://www.pgpf.org/blog/2021/07/what-is-the-salt-cap-and-w...
Tack on the 5% income tax rate, and you'll hit the cap pretty easily. For example, a single person making any amount (with that property tax amount) will hit the cap. Ditto for a couple each making $145k.
There are a handful of states with extremely high taxes (IL/NJ/CT/CA/NY/MD/etc), but they are solidly Democrat. I do not envision the other Democrat states who would not benefit from SALT cap increases to care about going out on a limb for them.
This is a great article summarizing what I am trying to say.
https://thehill.com/homenews/senate/591378-salt-change-likel...
> Critics grumble that raising the cap on SALT deductions runs counter to what they say is the main political rationale for passing the legislation: addressing wealth inequality.
Repubs really put Dems in a bad spot with this one.