The final week of the Republican primary was essentially a formality, but in hindsight an exceptionally important formality.

As long as Donald Trump still had to go through the motions to fend off candidates whose campaigns had been reduced to simulacra, and as long as his opponents were clinging to the hope of defeating him at the GOP convention, their combat served as a kind of permission for reporters to treat Trump’s campaign as the anomaly that it was.

On the eve of the fateful Indiana primary, when Trump infamously and speciously linked Ted Cruz’s father, Rafael, to the assassination of John F. Kennedy, The Washington Post ran a story headlined, “How on earth is the media supposed to cover Trump’s wacky JFK-Cruz conspiracy theory?” Glenn Kessler, who writes the Post’s fact checker column, gave Trump all four of his dreaded Pinocchios. Even the Post’s straight news piece about the supposed Cruz/Lee Harvey Oswald connection lead with an incredulous dependent clause, describing Trump as “Never one to shy away from discussing unsubstantiated tabloid fodder …”

In theory, debunking political whoppers is what the press is supposed to do, but in practice, things aren’t usually so straightforward. Politicians control access to themselves and their privileged information, which gives them outsize control over who breaks news. With their parties and supporters behind them, they can freeze out adversarial reporters and dismiss accusations of dishonesty as media bias. But in Trump’s case, reporters weren’t the lone arbiters of truth during the primaries. Other Republicans participated, too. Ted Cruz called Trump an “utterly amoral” “pathological liar,” a “narcissist” and a “bully.” The press wasn’t adjudicating Trump’s claims so much as they were relaying a cross-ideological consensus that Trump was unglued.

Just a few hours after he addressed the JFK conspiracy theory, Cruz suspended his campaign and the dynamic between the press and Trump changed. Leading Republicans stopped calling Trump a liar and trying to deny him their party’s nomination. In embracing Trump, they essentially rescinded their permission to the press to treat him as an outlier.