It depends
First we have to understand the difference between standard deductions and itemized deductions.
Lets use my favorite example of Single Mother, 3 kids, $30,000 deduction
Filing Status - Head of Household
Standard Deduction - $8,800
This means that the MINIMUM deduction she can have is $8,800, so when we accumulate itemized deductions they must be over this amount or they don't count.
Typical Itemized Deductions:
Mortgage Interest
State Income Tax/Sales Tax if no Income Tax
Property Tax
Assuming $110k house, 1st year of payment, $1500 property taxes
Mortgage Interest - $5400
Property Taxes - $1500
State Income Tax - $400 (no easy calc)
Total $7300 = Use Standard Deduction
So dropping this would NOT be a tax hike (only if it exceeded 8800)