3 candidates for the Democratic Presidential nomination have dropped out, Jay Inslee, John Hickenlooper, and Seth Moulton.
While Inslee actually ran on a substantive issue, he focused on anthropogenic climate change, Hickenlooper and Moulton pretty much ran against the Democratic Party, with Hickenlooper likening opposition to fracking to Stalinism, and Moulton engaging in jeremiads against the Democratic Party.
Good riddance to the last two, though Inslee, did manage to make addressing climate change s significant issue in the primary, which is a good thing.