In the spring of 1968, Klokocka became a deputy in the Czech National Council, the Czech lower house within Czechoslovakia during the height of the Prague Spring reform period. He also became the dean of the Faculty of Law in Brno, where he drafted new election laws for Czechoslovakia. However, in August 1968 Soviet and other Warsaw Pact forces invaded Czechoslovakia and crushed the liberalization movement. Klokocka was removed from public office and his academic positions at the university.