Americans are in danger of ignoring casual lies by President Trump, making him a bigger threat in a sense than Russian actors trying to interfere in U.S. elections, according to former FBI Director James Comey.

“I’m sure Russia is engaged in efforts to undermine all manner of American institutions, but the president of the United States tweets lies about those institutions nearly every day,” Comey said Thursday at a Hewlett Foundation event near San Francisco. “He does it so often that we’ve become numb to it. And there’s danger in that numbness.”