Tuesday night could not have gone much better for Hillary Clinton. The results on the Democratic side moved her closer to winning the nomination. The results on the Republican side pushed the G.O.P. even closer toward nominating a candidate who would be at a serious disadvantage in the general election.

None of this means the primary season will end soon. The Democratic contest could go all the way until the California primary June 7. The Republican contest could last all the way to the convention.

But the Democratic contest now looks like a foregone conclusion. Mrs. Clinton significantly added to her delegate lead with a 30-plus-point win in Florida and comfortable margins of victory in North Carolina and Ohio.

It is difficult to overstate the importance of Mrs. Clinton’s huge win in Florida, the country’s third-largest state. It’s too early to say what her exact delegate margin will be, but it could come very close to surpassing the delegate margins from all of Bernie Sanders’s wins, combined.