Updated at 9:34 p.m. ET
Christopher Krebs, the Department of Homeland Security director who had spearheaded a campaign to counter rumors about voter fraud, has been fired, President Trump tweeted on Tuesday.
Trump, in two misleading tweets about the security of the U.S. election, said Krebs' termination was "effective immediately."
In response, Krebs tweeted, "Honored to serve. We did it right. Defend Today, Secure [Tomorrow]."