While Election Day happened 40 days ago, it didn't mean the end of the election. Tomorrow though, finally, the 2016 presidential will (probably) be over after the Electoral College convenes and (probably) declares Donald Trump president of the United States. Probably.

There are 538 electors total—some of them are politicians, some of them are people close to the candidates (like Bill Clinton, who's a New York elector this year), and at least one of them is a teenager. They'll convene in their respective states on Monday and cast two votes: one for president, and one for vice president.

It's likely that Trump, who lost the popular vote by over two million votes but won 30 states and a projected 306 electoral votes, will get the 270 votes he needs to officially become our next president. But, as the Times explains, there are a few unlikely scenarios that could prevent Trump from taking office: electors aren't constitutionally bound to vote a certain way and can choose to become "faithless" electors and vote against their state's popular vote result. These faithless electors could face fines or disqualification, but the consequences of voting against Trump in a red state aren't clear since almost every elector has voted with their state's results in past elections.

At least one elector, the aforementioned teenager from Washington state, announced that she would vote against her state's chosen candidate—but since Clinton won Washington, the teen elector will instead vote for an "alternative Republican" to prevent Trump from taking office. Four Colorado electors have promised to do the same thing.

Electors in states that went red are also being called on to vote against Trump. This week, celebrities including Martin Sheen, Debra Messing, and Richard Schiff issued a plea to Republican electors to vote for a qualified alternative to Donald Trump.

"By voting your conscience, you and other brave Republican electors can give the House of Representatives the option to elect a qualified candidate for the presidency," they said. According to Politico reporter Kyle Cheney, some electors have begun receiving personalized video messages urging them to vote against Trump.

However, no one knows exactly how many faithless electors there will be tomorrow—estimates range from one to 25. So far, Texas GOP party operative Chris Suprun is the only Republican elector to go public with his plan to vote for someone other than Trump.

Carole Joyce, 72-year-old a Republican elector from Arizona, told the Washington Post that she received a deluge of emails, phone calls, and physical mail from thousands of voters, begging her to vote against Trump. Joyce, a Trump supporter, admitted that the letters had an impact. "I've seen enough funerals, I'm tired of hearing bagpipes," she said. "But I signed a loyalty pledge, and that matters."

Lawrence Lessig, a Harvard Law professor working with a group called Electors Trust that offers free legal support to electors, told reporters that his group has spent $20,000 on security for its attorneys because of threats. Suprun, the sole Republican elector who has publicly said he won't be voting for Trump, has allegedly received death threats as well.

If enough Republican electors vote against Trump, a few things can happen—they could swing the vote to Clinton, or they could prevent either candidate for hitting the necessary 270-vote threshold. The first scenario is incredibly unlikely—38 Republican electors would have to vote both against Trump and for Clinton, and all of the Democratic electors would have to vote for her as well. But if 37 electors defect and vote for another Republican, like many voters are calling for them to do, the House is tasked with choosing our next president. Whichever candidate wins 26 or more states is elected president. Thirty-three state delegations are currently under Republican control, so the vote would likely swing to Trump.

But if neither candidate receives the necessary number of House votes by January 20th, 2017, the new vice president becomes the acting president. If the House doesn't choose a winner, the a new vice president is selected by the Senate. If the Senate is unable to choose a vice president, Joe Biden casts the deciding vote.

Speaking of vice presidents, Biden is expected to preside over the electoral vote count and will declare the winner (if there is one). He'll also ask if there are any objections, which would allow lawmakers to challenge both individual electoral votes or state results as a whole, and these objections must be made in writing and signed by at least one member of the House and one member of the Senate—meaning that any elector who votes against their state could have their vote thrown out by Congress.

So the election may end tomorrow, or it may drag on forever (or at most for another month). At this point, we can't tell you which would be worse.