The media are abuzz with stories on Mark Cuban's possible run for Democrat nominee for president. Read here, here, and here.
It's seems early to begin thinking about the 2020 presidential election, unless you are the one thinking of giving it a shot. A prospective candidate will need to study issues, identify potential staff and policy experts, build a rolodex of financial supporters, and so forth.
So why Mark Cuban now?
Your friendly proprietor is quite sure that Cuban would like to avoid, or at least minimize, the grueling presidential campaign. He can largely achieve that goal if he has all the big Democrat donors lined up behind him (e.g., Silicon Valley, New York bankers, etc.). He would like to avoid a political fight with the Democrat establishments of the Clintons, the Obamas, and the Bernie Sanders-Elizabeth Warren far-left wing of the Democrat Party.
My guess is that Democrat Party, to the extent there is such a thing, would like to avoid the destruction that a far-left candidate would wring. If Cuban signifies his availability, it seems reasonable to suppose that a consensus could build around his candidacy by late 2018. If he can minimize the expenditure of time and money in running the gauntlet of primaries and caucuses, he would be free to amass a billion dollar-plus war chest, get his campaign in order, and travel the country to secure and expand the Democrat base. Were that to be the case, he would be well-placed to take on Trump or any other Republican should Trump decide not to seek a second term.