Hmmm. This has no legs and is, frankly, just a very shabby and petty thing for a sitting President to waste his (our) time on.
For federal purposes, you can deduct property taxes and mortgage interest for both your primary and secondary residence. It may make a difference for state purposes, depending on the states involved.
This is old news btw. Topic was covered in 2023:
"For more than a decade, California Senate hopeful Rep. Adam Schiff has claimed his primary residence is a 3,420 square foot home he owns in Maryland, according to a review of mortgage records.
At the same time, Schiff has for years taken a homeowner’s tax exemption on a much smaller 650 square foot condo he owns in Burbank, California, also claiming that home as his primary residence for a $7,000 reduction off the 1% property tax, amounting to a roughly $70 in annual savings. He did not take an exemption on his home in Maryland."
The ambiguous language of the law means Schiff is likely legally in the clear in regard to his taxes and mortgage, and there is no group that tracks if other members of Congress fill out their tax and mortgage documents in a similar way.
Santorum, Oz and Herschel ring any bells here? lol