OK, so President Trump’s name is in the Jeffrey Epstein files. But who put it there? Could it possibly have been Barack Obama from his prison cell? Or a tranquilized Hillary Clinton? Oh wait, maybe it was etched onto the documents by Joe Biden’s magical autopen.

Or wait, is that mixing up different scandals? It’s so hard to keep up with the latest wild notions circulating in the capital and beyond. Washington is awash in conspiracy theories these days, a cascade of suspicion and intrigue promoted or denied in the Oval Office, ricocheting around Capitol Hill and cable news and propelled at warp speed across social media.

No commander in chief in his lifetime has been as consumed by conspiracy theories as President Trump and now they seem to be consuming him. They have been the rocket fuel for his political career since the days when he spread the lie that Mr. Obama was secretly born overseas and therefore not eligible to be president. More than a decade later, Mr. Trump is coming full circle by trying to divert attention from the Epstein conspiracy theory with a new-and-improved one about Mr. Obama supposedly committing treason.

The harmonic convergence of competing conspiracies has overshadowed critical policy issues facing America’s leaders at the moment, whether it’s new tariffs that could dramatically reshape the global economy or the collapse of cease-fire talks meant to end the war in Gaza. The Epstein matter so spooked Speaker Mike Johnson that he abruptly recessed the House for the summer rather than confront it. The allegations lodged against Mr. Obama so outraged the former president that he emerged from political hibernation to express his indignation at even having to address them.

The whispers and questions — “this nonsense,” as Mr. Trump put it — followed the president all the way to Scotland, where he landed Friday for a visit to his golf club.