WASHINGTON — It’s official: the Washington Redskins won their last home game before the 2016 Presidential Election, meaning that Hillary Clinton and the Democrats will stay in power.

Not sure how the two are connected? It is call the “Redskins Rule,” an obscure connection between football and politics that could only happen in the nation’s capital. The rules says that if the Redskins win the last game before the election, then the current party stays in power. If the Redskins lose, the White House switches parties.

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If it sounds non-scientific, that’s because it is. But it’s a rule that has correctly called 17 of the last 19 presidential elections, dating back to the team’s relocation to Washington in 1937.

The rule was actually perfect at predicting every incoming U.S. President between 1940 and 2000. It was just before the 2000 election that Steve Hirdt of Elias Sports Bureau and Monday Night Football first established the premise of the rule.

These were his thoughts at the time, as recalled in a 2012 interview:

“I started looking through the Redskins’ press guide where they list all the scores in the back,” Hirdt recalls. “I was making a list of the last home game before the election because that was the game we were covering. I tried to align it with the Democrats or the Republicans and then looked at the incumbents. “I was shocked to see it lined up exactly right, that whenever the Redskins won their last home game prior to the presidential election, the incumbent party retained the White House, and whenever the Redskins lost their last home game prior to the election, the out-of-power party won the White House.”

The rule first failed during the 2004 election, when the Redskins lost to the Green Bay Packers 28-14, but Republicans maintained control of the White House. Hirdt created what he called the “Redskins Rule 2.0,” saying that because Bush lost the popular vote in 2000, it reversed the polarity of the rule in 2004.

Conveniently. Temporarily. Whatever.

The rule returned to its original form in 2008, when the Redskins lost and the challenging Democrats won back the White House. It did not fail completely until 2012, when the Redskins lost to the Panthers, but the Democrats maintained the presidency.

Now, the final home game results are in and the Redskins won, which means that the Democrats and Hillary Clinton are destined for the White House. If this proves true, then the Redskins Rule will advance to 18-for-20, which is a solid 90 percent accurate.

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