What happens after June 7?

Because the GOP already has their candidate, for better or worse, the last big primary day is June 7 and features Clinton v. Sanders. For a while it seemed like the only debate you might see before that is Sanders v. Trump, though, but the Donald was stared down by Bernie. The states with the most delegates at stake are California, NJ, and New Mexico. The first two are semi-closed (you need to be a registered Dem to vote in the Dem primary, but undeclared voters can declare at the polls); the...