...simply market forces...probably due in large part to the "Work From Home" trend that's being evidenced in many big cities since COVID hit, like San Francisco...e.g. an extended family member who's a partner in a SF law firm can't entice attorneys to make the trek into the office...
Now, as for a comparison with Trump's predicament...show us Blackstone/Pimco tax returns since 2011 when they bought the D.C. Market Square property...did they play games and report the value all along at a much lower level than what they bought it for?...if so, then by all means bring charges for defrauding the city's residents.
Link: https://commercialobserver.com/2024/01/dc-office-market-finishes-2024-with-high-vacancy-rates/#:~:text=The%20average%20asking%20rental%20rate,the%20market%2C%20according%20to%20CBRE.