The mortgage interest deduction is all but gone now for most people. Since the new tax code gets rid of dependent exemptions, and replaces it with a larger standard deduction (24K for married filing jointly), combined with the cap on SALT taxes, most people won't have a large enough mortgage interest (plus max 10k property taxes + state income tax) deductions to exceeded the standard deduction.
The net result is that there wasn't much movement up or down in taxes for typical homeowners (married, children, middle class home). Which means that with fewer people benefiting from the mortgage interest deduction, there may be hope that it goes away in the future. Either that, or it will stick around since it is a benefit for wealthier Americans (who have more political control).