True. Most states start with your federal AGI, then allow either federal itemized deductions, or a meager standard deduction (e.g. $2,300 for a single filer, $3,000 for a joint filer in Georgia). So, if after losing itemized deductions, you are forced to take the federal standard deduction, then you have to take the state standard deduction as well.
I will lose roughly $12K in itemized deductions making the federal standard deduction higher. And, if forced to use the federal standard deduction, then my state itemized deductions will go from $24K, and change, to the $2,300 Geordia standard deduction. That means I will owe $1,100 more in state taxes at 5% of $22K.
So, in my case, and many others I can name, I will be getting a federal and state tax hike. But, I'm sure Congress already thought about this. Right? Unless all 40 some-odd states with an income tax change their laws simultaneously, this hidden gem will negate any of the proclaimed tax savings Republicans in Congress are harping about.