What kind of business did the POTUS run, and in what fashion? Business acumen CAN be useful for leading a nation IF it includes competent management (e.g., empowering people around you to do take responsibility and do quality work). And if such business is conducted with integrity, leading those with whom you do business to respect you and your word.
Is this how you view DT's business history? If so, what do you make of the thousands of lawsuits, Foundation court ruling, bankruptcies, inability to acquire bank loans, opaque or hidden financial records, reports from numerous contractors of not receiving payment for services rendered, and University fraud case?