Tuesday was a good day for Hillary Clinton, even though her delegate lead is a bit smaller. Donald Trump's lead is a bit larger, which made Tuesday a little disappointing. Delegate math is weird. Here are the details.
Bernie Sanders won landslides in the Utah and Idaho caucuses; Clinton's solid win in the Arizona primary wasn't enough, this time, to give her a delegate victory on the day. Nevertheless, Sanders did nothing to change the situation: He can't win primaries in large, ethnically diverse states, and if he can't do that, he can't come close to the nomination.
There's essentially nothing that Sanders has done to this point to give him even a hint of a chance of catching up in pledged delegates, or of eating into Clinton's decisive lead in superdelegates. The only question remaining is how long Sanders will stay in, and whether he can find a way to do something constructive with the enthusiasm he has generated.
Trump won solidly in winner-take-all Arizona, but Ted Cruz had an even larger win in Utah -- with more than 50 percent of the vote, he takes all of the delegates there. That gave Trump 58 for the day, Cruz 40, plus 9 uncommitted delegates from American Samoa.