WASHINGTON — As a candidate, Donald J. Trump claimed that the United States government had known in advance about the Sept. 11 attacks. He hinted that Antonin Scalia, a Supreme Court justice who died in his sleep two years ago, had been murdered. And for years, Mr. Trump pushed the notion that President Barack Obama had been born in Kenya rather than Honolulu, making him ineligible for the presidency.
None of that was true.
Last week, President Trump promoted new, unconfirmed accusations to suit his political narrative: that a “criminal deep state” element within Mr. Obama’s government planted a spy deep inside his presidential campaign to help his rival, Hillary Clinton, win — a scheme he branded “Spygate.” It was the latest indication that a president who has for decades trafficked in conspiracy theories has brought them from the fringes of public discourse to the Oval Office.
Now that he is president, Mr. Trump’s baseless stories of secret plots by powerful interests appear to be having a distinct effect. Among critics, they have fanned fears that he is eroding public trust in institutions, undermining the idea of objective truth and sowing widespread suspicions about the government and news media that mirror his own.
“The effect on the life of the nation of a president inventing conspiracy theories in order to distract attention from legitimate investigations or other things he dislikes is corrosive,” said Jon Meacham, a presidential historian and biographer. “The diabolical brilliance of the Trump strategy of disinformation is that many people are simply going to hear the charges and countercharges, and decide that there must be something to them because the president of the United States is saying them.”
Barr’s attempt to explain away her comment about Jarret as “a bad joke about her politics and her looks,” depends on the assumption that her audience would understand her references to both the racist belief that African-Americans look like apes and the baseless conspiracy theory, popular on the far-right, that Obama and his close adviser were secretly agents of a Muslim plot for global domination.
Although she deleted her racist tweet about Jarrett, the rest of Barr’s Twitter feed reveals a mind saturated in far-right conspiracy theories. In just the hour leading up to her apology on Tuesday, Barr’s tweets and retweets included: references to the viral “QAnon” conspiracy theory, which holds that a senior government official is using 4chan to post clues about pedophiles in the intelligence services plotting against Trump; a blog post claiming that Obama had directed the CIA to spy on Trump’s campaign; lies about the philanthropist George Soros having collaborated with the Nazis and claims that he was scheming to undermine democracy in cahoots with Chelsea Clinton; another attempt to smear Jarret by claiming that her mother was an anti-American communist; and an impassioned defense of Tommy Robinson, a far-right English nationalist who was jailed for contempt of court in Britain after using Facebook to harass and smear British Muslims.
As outrage spread across social networks over Barr’s clear racism against an African-American woman, several commentators noted that ABC had previously seemed willing to overlook her prior, frequent expressions of anti-Muslim bias.
Barr herself replied to one such comment, claiming that it was not racist to hate an entire class of people as long as they are defined solely by their religion and not their ethnicity.
While it is probably only a matter of time until the president weighs in, the Yahoo News editor Colin Campbell pointed out that Barr’s tweets spreading lies about Soros had already been retweeted by Donald Trump Jr.