Here is where this could be headed, according to the article:
Republicans control both legislative chambers in the six most closely contested battleground states. Of those, Arizona and Florida have Republican governors, too. In Michigan, North Carolina, Pennsylvania, and Wisconsin, the governors are Democrats.
Foley, the Ohio State election scholar, has mapped the ripple effects if Republican legislators were to appoint Trump electors in defiance of the vote in states like Pennsylvania and Michigan. The Democratic governors would respond by certifying the official count, a routine exercise of their authority, and they would argue that legislators could not lawfully choose different electors after the vote had taken place. Their “certificates of ascertainment,” dispatched to the National Archives, would say that their states had appointed electors committed to Biden. Each competing set of electors would have the imprimatur of one branch of state government.
In Arizona, Secretary of State Katie Hobbs, who oversees elections, is a Democrat. She could assert her own power to certify the voting results and forward a slate of Biden electors. Even in Florida, which has unified Republican rule, electors pledged to Biden could meet and certify their own votes in hope of triggering a “controversy or contest” that would leave their state’s outcome to Congress. Much the same thing almost happened during the Florida recount battle of 2000. Republican Governor Jeb Bush certified electors for his brother, George W. Bush, on November 26 of that year, while litigation of the recount was still under way. Gore’s chief lawyer, Ronald Klain, responded by booking a room in the old Florida capitol building for Democratic electors to cast rival ballots for Gore. Only Gore’s concession, five days before the Electoral College vote, mooted that plan.
In any of these scenarios, the Electoral College would convene on December 14 without a consensus on who had legitimate claims to cast the deciding votes.
Rival slates of electors could hold mirror-image meetings in Harrisburg, Lansing, Tallahassee, or Phoenix, casting the same electoral votes on opposite sides. Each slate would transmit its ballots, as the Constitution provides, “to the seat of the government of the United States, directed to the President of the Senate.” The next move would belong to Vice President Mike Pence.
This would be a genuine constitutional crisis, the first but not the last of the Interregnum. “Then we get thrown into a world where anything could happen,” Norm Ornstein says.