The best properties in former President Trump’s portfolio are not Trump hotels, condominium buildings, or country clubs. Instead, they are two properties owned 30% by the Trump Organization and 70% by Vornado Realty Trust (NYSE: VNO). Located at 555 California Street in San Francisco and 1290 Avenue of the Americas in New York City, these are office buildings that have generated high rates of cash flow over the years.

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As the majority owner, Vornado controls the two properties. Trump’s stake is valued at approximately $784 million. The Trump Organization has about $400 million in debt coming due in 2023, so it has an interest in selling its Vornado stake.

Naturally, they would want to see the highest possible price for the sale. The buildings were on the market in 2020 but have since been pulled. In the meantime, the cash flow generated by rent has been an important part of the Trump Organization’s revenue.

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Now, NBC is reporting on a new tactic by Vornado: to cut back or even cut off the cash flow payments. This may be justified by the pandemic-related decline in rental income, and it is Vornado’s right as the majority partner. But given that the Trump Organization would miss the money, the tactic has another possible outcome: Trump may need to sell its stake in these properties back to Vornado at reduced valuation in order to raise much-needed cash.

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On the other hand, the connection to Trump puts off some potential tenants, so Vornado has an economic incentive to get rid of the minority stake.

This will be interesting to watch, given the combination of economic and political motivations at play. And, we still don’t know when or how many people will return to office work.

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This article originally appeared on GOBankingRates.com: Trump Faces Trouble with the Crown Jewels of His Real Estate Empire