It happened as the Democrat from West Covina on Wednesday heard testimony on a bill that would give state regulators power to set limits on health insurance premiums.
One voter speaking in favor of Assembly Bill 52 said his mother, a small business owner, canceled her insurance when it skyrocketed to $800 a month.
After his remarks, Hernandez asked the voter where he lived. When the voter said he lives in Monterey Park, the senator said, "After the re-districting lines, you're not going to be in my district anymore. Monterey Park is no longer in my district."
Hernandez as well as others in the meeting laughed following the comment.
Hernandez's office could not be reached for comment.