2019 donald dukes running mate quits presidential race

I think there may be some confusion here.

There is no record of a Donald Duke running for president in 2019, nor is there any record of his running mate quitting the presidential race. Donald Duke is a Nigerian politician who was the Governor of Cross River State from 1999 to 2007, but he has not been a presidential candidate in recent years.

If you meant to ask about a different person or event, please feel free to clarify and I'll do my best to help!