On the 19th of March, just as the law was at a peak of debate, 200 members of the self-called "May 19th Green Movement" gathered outside of the legislative chambers in support of "DPP" legislators, hoping that they would walk out of the sessions and join them in a protest march on the streets of Taipei.
起初，「民進黨中央黨部」主張，國安法沒有製定的必要，要堅持反對到底。三月十九日，國安法草案正審得如火如荼，立法院門外聚集了兩百多位民眾，他們自稱是「五一九綠色行動本部」發動的，要支持「民進黨」立委，希望他們退出國安法的審查，一起來走向街頭。