There’s no shortage of legal theories that could challenge Mr. Trump’s anointment, but they come from outsiders rather than the Democratic Party. Impassioned citizens have been pleading with electors to vote against Mr. Trump; law professors have argued that winner-take-all laws for electoral votes are unconstitutional; a small group, the Hamilton Electors, is attempting to free electors to vote their consciences; and a new theory has arisen that there is legal precedent for courts to give the election to Mrs. Clinton based on Russian interference. All of these efforts, along with the grass-roots protests, boycotts and petitions, have been happening without the Democratic Party. The most we’ve seen is a response to the C.I.A. revelations, but only with Republicans onboard to give Democrats bipartisan cover.

Take the recount efforts in Pennsylvania, Michigan and Wisconsin. While the Democratic Party relitigates grudges in the press, Jill Stein, the Green Party candidate who received about 64 million fewer votes than Mrs. Clinton, has led the effort. The Democrats have grudgingly participated from the sidelines, but only because public perception forced them to. This effort has proved feeble, with a Pennsylvania judge denying the request because it was “later than last minute.”

Contrast the Democrats’ do-nothingness to what we know the Republicans would have done. If Mr. Trump had lost the Electoral College while winning the popular vote, an army of Republican lawyers would have descended on the courts and local election officials. The best of the Republican establishment would have been filing lawsuits and infusing every public statement with a clear pronouncement that Donald Trump was the real winner. And they would have started on the morning of Nov. 9, using the rhetoric of patriotism and courage.

How can we be so certain? This is what happened in 2000. When Florida was still undecided after election night, the Republicans didn’t leave their fate in the hands of individuals or third-party candidates. No, they recruited former Secretary of State James A. Baker III to direct efforts on behalf of George W. Bush. They framed their project as protecting Mr. Bush’s victory rather than counting votes. They were clear, consistent and forceful, with the biggest names in Republican politics working the process.