Mensch and "Heat Street" have since courted controversy by promoting unverified claims, hoaxes, and conspiracy theories about the Trump administration and its ties to the Russian Federation. Among other allegations she has posted online, Mensch claimed that she had obtained evidence that Russian president Vladimir Putin had American extremist commentator Andrew Breitbart, the founder and executive director of far-right media outlet "Breitbart News" who died of a heart attack, murdered so his job would go to his deputy, Steve Bannon. She has stated that the 2017 Istanbul nightclub shooting, which was perpetrated by Abdulkadir Masharipov on behalf of the terrorist organization Islamic State of Iraq and the Levant, was a Russian false flag operation with Russia posing as ISIL. She has stated that "Bannon and his team" were behind the 2017 Jewish Community Center bomb threats that were committed by two people, American Juan M. Thompson and Israeli-American Michael David Kadar, with no ties to Bannon. She has claimed Russian intelligence planted inflammatory emails implicating former U.S. Senator and 2016 Democratic Party presidential candidate Hillary Clinton on disgraced former U.S. House member Anthony Weiner's computer. Mensch has also, without evidence, accused numerous people, including Facebook founder Mark Zuckerberg and venture capitalist Peter Thiel, of being Russian "shills", "moles" and "agents of influence".