Geoffrey Berman, a former top federal prosecutor during Donald Trump’s administration, reportedly writes in a new book that a spurious investigation of former Secretary of State John Kerry was set in motion in response to then-president Donald Trump’s May 2018 tweet accusing Kerry of “potentially illegal shadow diplomacy” with Iran. Trump’s tweet came in response to a report the then-president was watching at the time on Fox News, according to a Media Matters review.

As president, Trump reportedly watched hours of Fox programming a day and regularly tweeted his responses to what he was seeing on television in real-time or on tape-delay, as Media Matters extensively documented. The network’s commentators and coverage shaped the former president’s worldview – and thus his administration’s actions, including presidential pardons, federal contracting, legislative and communications strategy, pandemic policies, and much more. 

Now it seems we can add a federal probe of one of Trump’s political opponents to the list. The New York Times reported Thursday that in a new book, Berman wrote that while he was U.S. Attorney for the Southern District of New York, Justice Department officials ordered him to investigate Kerry after Trump criticized Kerry’s “possibly illegal” behavior on Twitter. Those tweets have their roots in Fox’s coverage.

On May 7, 2018, Washington, D.C., was abuzz with the prospect that Trump might withdraw from the Iran nuclear accord that Kerry negotiated during the Obama administration. The president, meanwhile, spent the morning tweeting along with Fox & Friends, the Fox morning show, which he was apparently watching on tape-delay.

At 10:08 a.m. ET, Trump tweeted, “The United States does not need John Kerry’s possibly illegal Shadow Diplomacy on the very badly negotiated Iran Deal. He was the one who created this MESS in the first place!” As I noted at the time, that tweet tracked with the content of a segment that had aired on Fox’s America’s Newsroom roughly an hour earlier.

During that segment, Fox correspondent Griff Jenkins discussed a Boston Globe report from a few days earlier about Kerry’s behind-the-scenes effort to salvage the Iran deal. Kerry “has been engaging in what some are calling shadow diplomacy,” Jenkins reported, using the same term Trump would in his subsequent tweet. 

Immediately after Jenkins’ report, anchor Bill Hemmer turned to contributor Byron York, who said that Kerry’s actions were “a big deal” because Kerry was “meeting with foreign governments in an attempt to undermine the current U.S. administration.” York added that while “you will hear” that Kerry may have violated the Logan Act, “it likely does not apply here.”

Indeed, conservatives were raising the prospect that Kerry had violated the Logan Act – including Fox & Friends host Steve Doocy earlier that morning, in a segment the then-president likely watched. But as University of Texas School of Law professor Stephen Vladeck explained in the Globe report, that statute would not apply in this case, since Kerry was acting to maintain what was (at the time) current U.S. policy. 

Trump’s tweet set off his supporters at the network, particularly Sean Hannity, who maintained dual roles as a close Trump adviser and primetime host. On his show that night, Hannity suggested that Kerry was “violating the law, the Logan Act,” and asked, “Where are the agents in the FBI and the DOJ breaking down John Kerry's door? Another blatant example of a two-tier justice system sadly in this country today.”

Later in the program, Hannity polled members of his panel as to whether Kerry had violated the Logan Act. After they all agreed that he had, Hannity said, “Let's see when that investigation begins.”

Fox’s criticism of Kerry continued into the next day on Fox & Friends, including a segment in which co-host Brian Kilmeade claimed his action “seems to be a violation of the Logan Act,” while his guest compared the former secretary of state to the Taliban. Roughly an hour after that, Trump tweeted, “John Kerry can’t get over the fact that he had his chance and blew it! Stay away from negotiations John, you are hurting your country!” 

Later that day, Trump announced that the U.S. would withdraw from the Iran deal.

Trump’s tweets had a major and immediate impact, Berman explained in his book. The Times reported:

According to the Times account, Berman wrote that in subsequent months, the Justice Department repeatedly pressured his office to move forward with the investigation of Kerry, particularly after Trump again tweeted about the purported crimes. 

“They were asking us, basically, what’s taking so long? Why aren’t you going harder and faster at this enemy of the president? There was no other way for me to look at it,” he wrote.

Berman said that when his office told the Justice Department it would not be prosecuting Kerry following a year-long investigation, the case was passed to another U.S. attorney’s office. When that office also determined the case lacked merit, he wrote, “the Kerry investigation just quietly died — as it should have.”

Trump ultimately fired Berman in June 2020 during a purge of federal prosecutors seen as insufficiently loyal to him.