The student's mother told CBS Sacramento that her 16-year-old son was attending an online class for Colusa High School from his bedroom where the pro-Trump flag is displayed on the wall. His chemistry teacher, who apparently disagreed with the political message, demanded that he take it down or adjust the camera angle so that the flag can't be seen.

"Since school has begun, my son has had this Trump flag hanging in his background," the student's mother told the news outlet.

One student took a recording of the online class when the incident took place. In the video obtained by CBS Sacramento, the teacher can be heard counting to 15 while repeating her demand.

"You can sit up, remove the flag, or reposition your camera within the next 15 seconds or I'm kicking you out of class," the teacher said. She didn't make it to 10 before the student waved goodbye and logged himself out of the virtual classroom.

The student's mother said she doesn't blame the teacher, who has since apologized for the incident.

"She is a new teacher and it's a mistake," she said. "There hasn't been any guidance given to her as a teacher for the school."