SentinelOne updated that post yesterday with copies of the email sent by Krebs and an email from Weingarten to staff. Weingarten’s email praised Krebs’ work “in service of democratic institutions and critical infrastructure.”
“I know he’ll take on this next chapter with the same clarity, conviction, and humility that defined his time here, and he carries our full respect with him as his journey continues,” Weingarten wrote.
Krebs-led CISA debunked election fraud claims
After Trump lost the 2020 election to Joe Biden, Krebs and CISA drew Trump’s wrath by actively debunking claims of election fraud made by Trump and his supporters. On November 17, 2020, Trump called Krebs’ statements inaccurate and insisted that “there were massive improprieties and fraud,” including dead people voting and voting machines changing votes from Trump to Biden.
“Therefore, effective immediately, Chris Krebs has been terminated as Director of the Cybersecurity and Infrastructure Security Agency,” Trump wrote in a tweet.
In last week’s presidential memorandum, Trump ordered the government “to take all appropriate action to review Krebs’ activities as a Government employee, including his leadership of CISA.” Trump also ordered “a comprehensive evaluation of all of CISA’s activities over the last 6 years, focusing specifically on any instances where CISA’s conduct appears to have been contrary to the purposes and policies identified in Executive Order 14149.”
The referenced executive order issued in January 2025 claimed the Biden administration “trampled free speech rights by censoring Americans’ speech on online platforms,” by exerting pressure on social media companies. It ordered the government to “identify and take appropriate action to correct past misconduct by the Federal Government related to censorship of protected speech.”
Krebs started working for the Department of Homeland Security in 2017 and became the first director of CISA in November 2018. Last week’s Trump memo said that CISA under Krebs’ leadership “suppressed conservative viewpoints under the guise of combatting supposed disinformation” and “covertly worked to blind the American public to the controversy surrounding Hunter Biden’s laptop.” The forthcoming investigations of Krebs and CISA’s activities will result in “recommendations for appropriate remedial or preventative actions to be taken to fulfill the purposes and policies of Executive Order 14149,” the Trump memo said.