What Sanders' Startling Michigan Win Means

It was a big night for Bernie: The senator from Vermont scored an upset win in Michigan that is certain to cause some sleepless nights for Hillary Clinton strategists—though her delegate count is still on track—and gives him momentum heading into some big votes next week. Donald Trump, meanwhile, demolished rumors of a Trump decline with victories in Michigan, Mississippi, and Hawaii. A roundup of coverage:

• The New York Times looks at how Sanders soared to victory in Michigan despite polls that had him as far as 30 points behind. He hit Clinton hard on trade deals, which are a major worry in Michigan and other Rust Belt states, and spent time in places like Kalamazoo that the Clinton campaign largely overlooked.
• FiveThirtyEight probes how the polls managed to get Michigan so wrong. One theory: Some Clinton supporters voted in the GOP primary instead to try to stop Trump.

• Trump is now perfectly set up for March 15, when he can effectively end the GOP race with wins in Ohio and Florida, according to the Washington Post's look at the night's winners and losers. The big loser: Marco Rubio, who was well below delegate thresholds in most states and may only get one or two from Hawaii.
• Politico looks at the Rubio campaign, which it says was flirting with a "death spiral" even before last night, while FiveThirtyEight explains why he is "likely to become a political idiom" if he can't mount a comeback next week.
• CNN takes a look at where it all went wrong for the Clinton campaign in Michigan—and at why her campaign still thinks Ohio will not be a problem.
• The Los Angeles Times reports on how the results highlighted the breadth of Trump's support, though exit polls offered glimmers of hope for his rivals.

(More Election 2016 stories.)