For a great indication of how much the Trump brand is worth, look no further than the retail price of the New World Red Reserve wine from Trump's very own winery in Monticello, Virginia.

Expand chart Reproduced from American Association of Wine Economists; Chart: Axios Visuals

By the numbers: Before Trump ran for president, his flagship red generally priced around 25% higher than other Bordeaux-style blends from the region. Now, it sells at roughly a 20% discount.