Already happened:
By February 2007, Trump Mortgage stopped paying rent to its landlord, 40 Wall Street LLC—which Trump owned, through the Trump Organization. What happened next? One Trump company took the other to court. In July 2007, 40 Wall Street LLC petitioned New York County Civil Court for $57,367.95 (the unpaid rent plus $450 in legal fees) and asked for permission to evict Trump Mortgage from its 25th-floor space. After Trump’s Trump Mortgage LLC failed to respond to the petition, Judge Debra Samuels ruled in favor of the Trump-owned 40 Wall Street LLC, and the struggling mortgage company, which went out of business in 2007, was booted out of Trump’s own building.