Democrats have to win moderates heavily though because conservatives vastly outnumber liberals.
Sort of. Democrats do much better with conservatives than Republicans do with liberals, though, mainly because black voters heavily self-identify as conservatives but most are also dyed-in-the-wool Democrats. (And just because they self-identify as conservatives doesn't mean they support what are traditionally considered conservative policies, though it does reflect much greater social conservatism than in the broader Democratic coalition.)
