Mark Cuban: Trump Politics Risky for Donald Trump Inc.

Business tycoon to business tycoon ... Mark Cuban thinks Donald Trump's run for the White House is putting his well-established brand in jeopardy.

We got the Mavericks owner and "Shark Tank" star in Austin -- where he was talking biz at the SXSW conference -- and he told us he thinks candidate Trump could "hurt more than help" the business side of Donald's empire.

The clip is interesting -- Mark stops short of criticizing the Donald's controversial comments, from a political standpoint. But remember, if Trump doesn't win ... he'll have to go back to business.