A new poll (take it with a grain of salt) released on Friday, February 24, 2017, shows Mark Cuban trailing Donald Trump by one percentage point, 41%-40%, with 19% undecided.
The full story can be read here.
While it's way early to start thinking about the Democrat nominee for president in 2020. Mark Cuban is getting increased press coverage. Don't be surprised if he emerges as the consensus Democrat candidate well before the campaign actively begins in 2017.
In that case, political science textbooks will have to be rewritten to describe a new political order in which "the business of government is business."