The teacher was filmed repeated saying the N-word after a student asked her to spell it during a reading of a Mark Twin novel at Sequoia Middle School in Fontana, California.
Some claimed Mulvaney appeared to be mocking women by staging a "minstrel show" of femininity in the video, an accusation leveled at her in the past due to her content.
Trump, who became the first former US president in history to be charged with a criminal offense, pleaded not guilty to 34 counts of offences detailed in the indictment.
The doctor is charged with three felony counts of poisoning and one felony count of domestic battery with injury, the Orange County District Attorney's Office said in a statement.
Kennedy, a former environmental lawyer, has long been at the forefront of the anti-vaccine movement, disseminating rumors that vaccines are harmful to children.