Her political interest was according to herself sparked at her elementary school Marienlyst where discussions were common in class. These discussions would include two students who were members of the Socialist Youth, one being her socialist-turned best friend. Jensen however soon found herself strongly opposed to their views. She joined the Progress Party in 1988, in part having been introduced to the party through her mother. Sometime before joining the party, she had briefly been a member of the Young Conservatives, for about a week.