Real estate tycoon Sam Zell said Tuesday he turned down Donald Trump's offer to enter into a partnership because the two simply have contrary approaches to doing business.
"I did my best for many, many years to stay as best under a rock as I possibly could. That was the way I approached doing business. Donald's approach is obviously very different," the chairman of Equity Group Investments told CNBC's "Squawk Box."
"You don't see my name on any buildings, do you? That's just not who I am. Far be it for me to criticize anybody else for whatever they want to do," he said.
As for Trump's presidential candidacy, Zell said there's a huge difference between someone being your day-to-day business partner and your political leader.