Former vice president Joe Biden confused his wife for his sister while giving a speech after notching several Super Tuesday primary wins.

"By the way, this is my little sister Valerie," Biden said in Los Angeles, while gesturing to his wife, Dr. Jill Biden.

"And I'm Jill's husband," he continued, taking the hand of his sister. "You switched on me," he said after realizing his mistake.

Following his South Carolina victory on Saturday, Biden won North Carolina, Virginia, Alabama, Minnesota, Massachusetts, Tennessee, Arkansas, and Oklahoma on Tuesday.