https://www.vox.com/2017/6/8/15764272/comey-testimony-trump-liar
"In response to James Comey’s testimony, White House Deputy Press Secretary Sarah Huckabee Sanders told reporters Thursday, “The president is not a liar.” It was a remarkable thing. That one, a press secretary actually had to assert this. But also because if you believe Comey’s testimony, Huckabee Sander’s statement is, itself, not true."