There are some who think the Democratic Party doesn't have a viable candidate to run for president in 2020. I think that's a ridiculous assertion. Democrats have a wealth of possible candidates. The eight listed above are just those that quickly came to mind -- and any of them would make a much better president than the current occupant of the White House. Do you have a favorite -- maybe someone I have failed to list here? If so, I would love to hear it.
NOTE -- You may notice that Bernie Sanders is not on my list. That's because he's still saying he is not a Democrat. He actually repeated that assertion this month (April 2017). If he's too ashamed of the party to proudly wear it's label, then he should not be considered as it's candidate. The leader of the Democratic Party should be someone proud to be a Democrat.