If Donald Trump is defeated in November 2020, his presidency will end on January 20, 2021. If he is reelected, then, barring other circumstances such as removal from office, his administration will terminate on the same day in 2025. In either of these scenarios, Trump would cease to be president immediately upon the expiration of his term. But what if he won’t leave the White House?

The American Constitution spells out how the transfer of power is supposed to work. Article II provides that the president “shall hold his office for the term of four years.” The 20th Amendment says that the president’s and vice president’s terms “shall end at noon on the 20th day of January … and the terms of their successors shall then begin.” Of course, a president may be reelected to a second four-year term, but under the 22nd Amendment, “no person shall be elected to the office of president more than twice.”

LAS VEGAS—The phrase Democratic establishment conjures images of something like the Illuminati with the power to determine the outcome of American elections. But so far, the supposedly all-powerful leaders of the party have been about as well organized as The Muppet Show.

Now, with Senator Bernie Sanders’s massive win in Nevada, he’s taken the lead in delegates and may never lose it. Efforts to stop him so far have been ineffective and made the party seem out of touch. This summer, party leaders may be forced to accept the nomination of a man who’s not officially a member of the party, who won’t have won a majority of primary voters, and whose agenda is popular with his progressive base but doesn’t have as much support with Democrats as a whole.

China is in the grip of a momentous crisis. The novel coronavirus that emerged late last year has already claimed three times more lives than the SARS outbreak in 2003, and it is still spreading. More than 50 million people (more than the combined metro populations of New York, Los Angeles, Chicago, and San Francisco) remain under historically unprecedented lockdown, unable to leave their city—and in many cases, even their apartment. Many countries no longer accept visiting Chinese nationals, or if they do, quarantine them for weeks. Big companies are pulling out of trade shows. Production is suffering. Profound economic consequences are bound to ensue, not just in China but around the world.

The scene is one many of us have somewhere in our family history: Dozens of people celebrating Thanksgiving or some other holiday around a makeshift stretch of family tables—siblings, cousins, aunts, uncles, great-aunts. The grandparents are telling the old family stories for the 37th time. “It was the most beautiful place you’ve ever seen in your life,” says one, remembering his first day in America. “There were lights everywhere … It was a celebration of light! I thought they were for me.”

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The oldsters start squabbling about whose memory is better. “It was cold that day,” one says about some faraway memory. “What are you talking about? It was May, late May,” says another. The young children sit wide-eyed, absorbing family lore and trying to piece together the plotline of the generations.

It’s 2020, and America is embroiled in not one but two catastrophic wars: one with Iran that has sucked in the entire Middle East, and another halfway across the world in North Korea sparked by Kim Jong Un test-firing nuclear-capable missiles that could hit the United States. It’s all the worse since the U.S. is waging both wars without allies, all of which have abandoned Donald Trump because of his incessant bullying.

Fortunately, this isn’t where we find ourselves today, but it’s what the president’s critics have been warning could occur if he carries on with policies that have shattered decades of conventional U.S. policy making. It’s not as if their concerns have no factual basis. The Trump administration really did come to the brink of war with Iran and North Korea. In neither case are the underlying tensions that got them there anywhere near resolved. America’s alliances are indeed in flux. But the fact that this is not our reality in 2020 is just as instructive as the fact that it could have been.

Senator Bernie Sanders endured nail-biters in Iowa and New Hampshire. Today, Nevada voters handed him a landslide victory.

Sanders’s dominant victory in the Silver State solidifies his standing as the front-runner for the Democratic presidential nomination, giving him and the progressive movement a clear boost as the race heads to more challenging territory in South Carolina and then across the country on March 3—Super Tuesday.

Although Nevada, like the first two Democratic nominating contests, sends relatively few delegates to the party’s national convention this summer, Sanders’s win demonstrated two key things. First, the democratic socialist from Vermont has significantly improved his performance from 2016 among a more diverse primary electorate; just 66 percent of caucus-goers in Nevada were white and more than one-quarter were Latino or black, according to entrance polls. That change could prove crucial as Sanders tries to rack up delegates in huge states like Texas and California on Super Tuesday. Waiting for him in March is former New York Mayor Michael Bloomberg, who is hoping that an unprecedented barrage of television ads will drown out his roundly criticized debate debut last week.

This article is a collaboration between The Atlantic and the Pulitzer Center on Crisis Reporting.

MANILA—On a recent afternoon, Antonio Carpio, a retired Filipino supreme court judge, stood before a few hundred students at Manila’s prestigious De La Salle University, charts and maps displayed on screens either side of him, and denounced both China and Philippine President Rodrigo Duterte for undermining the national interest of the Philippines.

Carpio, seen as a potential presidential candidate in the next election, in 2022, didn’t have to remind his audience that for several years Beijing has occupied the fish- and resource-rich reefs and shoals off the Philippine coast in the South China Sea, defying a ruling three years ago by a United Nations arbitration tribunal. Carpio’s audience was also receptive to his argument that the populist president of the Philippines, now a bit more than halfway through his six-year term, has essentially declined to press his own country’s claims on what international law has affirmed to be its maritime territory. “The Chinese aggression is the gravest external threat to the Philippines since World War II,” Carpio told the students. Looking toward the next presidential election, Carpio said, “We have to ask every candidate, ‘Are you with us in protecting Filipino territorial rights?’”

Let me begin with a confession. When I started to report out and write this article, I had a simple thesis: Bernie Sanders is not George McGovern.

The catastrophic loser of the 1972 presidential election, McGovern has become a convenient bogeyman for any moderate or conservative arguing that leftism is a fatal disease in a general election. McGovern won just one state, Massachusetts, while the incumbent, Richard Nixon, commanded 96 percent of the Electoral College vote. It was then the largest Republican landslide in U.S. history.

Surely, though, I thought, the McGovern analogy was just glibness masquerading as historical analysis. America in 1972 was a different country—before personal computers, Star Wars films, 40 years of rising income and wealth inequality, and the electoral gender gap.

Despite all the newspaper endorsements, Senator Elizabeth Warren is an underappreciated politician—and the candidate herself is among the ranks of those who have sold her short. She is a deep and original political thinker. Over her time in academia and in the Senate, she has evolved a distinctive critique of American capitalism as presently practiced, and a lyrical vision of what might replace it. Based on her presidential campaign, however, you wouldn’t really know it.

While Warren has clashed with some of the candidates to her right—she chastised former South Bend Mayor Pete Buttigieg for his foray into a wine cave and accused former New York City Mayor Michael Bloomberg of oligarchic tendencies—she has declined to truly delineate herself from Senator Bernie Sanders. The sharpest distinction Warren has drawn with her ally from Vermont is her gender. In a more accurate rendering of the pair, that is only the beginning of their differences.

Updated at 2:30 p.m. ET on February 10, 2020.

One day last fall, I sat down to create a new Facebook account. I picked a forgettable name, snapped a profile pic with my face obscured, and clicked “Like” on the official pages of Donald Trump and his reelection campaign. Facebook’s algorithm prodded me to follow Ann Coulter, Fox Business, and a variety of fan pages with names like “In Trump We Trust.” I complied. I also gave my cellphone number to the Trump campaign, and joined a handful of private Facebook groups for MAGA diehards, one of which required an application that seemed designed to screen out interlopers.

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The president’s reelection campaign was then in the midst of a multimillion-dollar ad blitz aimed at shaping Americans’ understanding of the recently launched impeachment proceedings. Thousands of micro-targeted ads had flooded the internet, portraying Trump as a heroic reformer cracking down on foreign corruption while Democrats plotted a coup. That this narrative bore little resemblance to reality seemed only to accelerate its spread. Right-wing websites amplified every claim. Pro-Trump forums teemed with conspiracy theories. An alternate information ecosystem was taking shape around the biggest news story in the country, and I wanted to see it from the inside.