February 22: Nevada Caucuses: A strong showing by the members of the Culinary Union, may benefit U.S. Senator Bernie Sanders.
February 29: South Carolina Primary. If Joe Biden does not come out on top, he will be toast. He should benefit with a strong showing of African Americans.
For more info:
go to: https://en.wikipedia.org/wiki/2020_Democratic_Party_presidential_primaries#2020