I sorta doubt we’d see elimination of mortgage interest deduction on investment property. The tax code seems to be written where pretty much all legitimate business expenses can be written off. An investment property is all business so they can write off the cost of the mortgage payments.
One reason why removing these things just continues to “stick it” to the W-2 middle class wage earner…
If they can’t write it off on their tax return, people would just create LLCs or something for the property and write it all off anyways.