If we assume that the overall tax rate has to be increased to make up for those deductions of high state taxes (which is a good assumption) then it follows that tax payers from low tax states are paying a higher rate than they otherwise would.
The reason they are doing this complicated stuff is that they want to abide by some rule that a tax cut can't increase projected deficits by more than some amount. In other words they need to recover some money to partially "pay for" the lost revenue from the rate reductions. There's also an increase in child tax deductions.
Thank you so much,that clears up things for me,
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It's Senate rules that they have to sort of "balance" the MUCH lower tax DEDUCTIONS FOR THE HUGE CORPORATIONS, so they're doing it on the backs of the middle class and also there's that fifth bracket on the uber wealthy that is in that mix too.