Alexander is one of the longest-tenured members of the White House press corps, and was working there on January 6, 2021, amid the US Capitol riot. He spoke to The Hollywood Reporter the following day about the experience. His coverage at critical moments such as the Capitol assault solidified him as a key figure in White House coverage. Alexander's experience in the White House and his ability to report on events of great importance have earned him the respect of his colleagues and the public. His departure leaves a void in the coverage of the White House.
"When I walked out yesterday, I put my mask on my face, my bag over my shoulder, I have my security guy with me and put my head down because, as a correspondent who covers the White House, we knew not to make eye contact with these folks who were, as they indicated, out to get folks," Alexander said. "As I marched through them, they were yelling 'stop the steal!, stop the f-ing steal!' and repeating this language that they have been marinating in from the president, and from different parts of the media universe".