Yup. I would be literally stunned if any state primary has no legal path forward for what to do if a primary candidate drops out before the convention. It could get messy, but this idea that the dems will not have a candidate in some states come November is FUD.
Broadly, when Americans vote in primaries, they are not voting directly for a candidate but kicking off a process that will ultimately send delegates to the party’s national convention. Those delegates are the ones who officially pick the nominee — and the Democrats’ convention hasn’t happened yet.