In 1965, HIAS was instrumental in the passage of an immigration law that finally replaced the National Origins Quota, eliminating decades of ethnic admission policies for the US. In 1968, HIAS came to the aid of Czechoslovakia's Jews after the suppression of the "Prague Spring," and to Poland's Jews after Communist Party factions started an internal fight using an anti-intellectual and anti-Semitic campaign, whose real goal was to weaken the pro-reform liberal party faction and attack other circles (1968 Polish political crisis).