Rubuta ci gaba don wannan sakin layi - A lokacin da yake gudun hijira, Horák ya shiga cikin ayyukan zamantakewar dimokuradiyya a gudun hijira (a 1948 an haɗa jam'iyyar tare da Jam'iyyar Kwaminis). Bayan da Jam'iyyar Kwaminis ta rasa ikonta
(1989), ya koma Czechoslovakia kuma ya sake kafa jam'iyyar, ya zama shugabanta. A lokacin zaben 1990, jam'iyyar ta kasa samun kujeru a majalisar dokoki; Horák kuma ya shiga cikin rikice-rikicen jam'iyyar. A zaben 1992, jam'iyyar ta samu halartar majalisa. A cikin 1993, Miloš Zeman ya maye gurbin Horák a matsayin shugaban jam'iyyar.