Russiagate allegations that the Kremlin has a subversive hold over President Trump, and even put him in the White House, have poisoned American political life for almost three years. Among other afflictions, it has inspired an array of media malpractices, virtually criminalized anti–Cold War thinking about Russia, and distorted the priorities of the Democratic Party. And this leaves aside the woeful impact Russiagate has had in Moscow—on its policymakers’ perception of the US as a reliable partner on mutually vital strategic issues and on Russian democrats who once looked to the American political system as one to be emulated, a loss of “illusions” I previously reported.

Contrary to many expectations, even if the Mueller report, said to be impending, finds, as did a Senate committee recently, “no direct evidence of conspiracy between the Trump campaign and Russia,” Russiagate allegations are unlikely to dissipate in the near future and certainly not before the 2020 presidential election. There are several reasons this is so, foremost among them the following:

§ The story of a “Kremlin puppet” in the White House is so fabulous and unprecedented it is certain to become a tenacious political legend, as have others in American history despite the absence of any supporting evidence.

§ The careers of many previously semi-obscure Democratic members of Congress have been greatly enhanced—if that is the right word—by their aggressive promotion of Russiagate. (Think, for example, of the ubiquitous media coverage and cable-television appearances awarded to Representatives Adam Schiff, Eric Swalwell, and Maxine Walters, and to Senators Mark Warner and Richard Blumenthal.) If Mueller fails to report “collusion” of real political substance, these and other Russiagate zealots, as well as their supporters in the media, will need to reinterpret run-of-the-mill (and bipartisan) financial corruption and mundane “contacts with Russia” as somehow treasonous. (The financial-corruption convictions of Paul Manafort, Mueller’s single “big win” to date, did not charge “collusion” and had to do mainly with Ukraine, not Russia.) Having done so already, there is every reason to think Democrats will politicize these charges again, if only for the sake of their own careers. Witness, for example, the scores of summonses promised by Jerrold Nadler, the new Democratic chair of the House Judiciary Committee.

§ Still worse, the top Democratic congressional leadership evidently has concluded that promoting the new Cold War, of which Russiagate has become an integral part, is a winning issue in 2020. How else to explain Nancy Pelosi’s proposal—subsequently endorsed by the equally unstatesmanlike Senate Republican leader Mitch McConnell, and adopted—to invite the secretary general of NATO, a not-very-distinguished Norwegian politician named Jens Stoltenberg, to address a joint session of Congress? The honor was once bestowed on figures such as Winston Churchill and at the very least leaders of actual countries. Trump has reasonably questioned NATO’s mission and costs nearly 30 years after the Soviet Union disappeared, as did many Washington think tanks and pundits back in the 1990s. But for Pelosi and other Democratic leaders, there can be no such discussion, only valorization of NATO, even though the military alliance’s eastward expansion has brought the West to the brink of war with nuclear Russia. Anything Trump suggests must be opposed, regardless of the cost to US national security. Will the Democrats go to the country in 2020 as the party of investigations, subpoenas, Russophobia, and escalating cold war—and win?

Readers of my new book War With Russia?, which argues that there are no facts to support the foundational political allegations of Russiagate, may wonder how, then, Russiagate can continue to be such a major factor in our politics. As someone has recently pointed out, the Democrats and their media are now operating on the Liberty Valance principle: When the facts are murky or nonexistent, “print the legend.”

This commentary is based on Stephen F. Cohen’s most recent weekly discussion with the host of The John Batchelor Show. Now in their fifth year, previous installments are at TheNation.com.