Nothing can be worse for our country than TV celebrities who trade on their wealth and fame. What do people like that know about the details of being President of the United States?
Oprah made her money by asking TV guests, "So, how are you today?" Does that make her ready to take on China and Russia?
On top of that, she did not come from a wealthy family. That means their is not accumulated experience of how the economy works and how our country can profit from it.
Add to that she does not oppose homer marriage and abortion and believes women are qualified to do the same work as men. We need laws to prevent such people from running for President.