In order to increase his political strength, FDR attempted to pack the U.S. Supreme Court in his favor by expanding the number of justices and adding new ones who supported his views. views. His plan was to add one justice for every current justice over the age of seventy who refused to step down. This would have allowed him to add six more justices, expanding the bench from nine to fifteen. This plan was ultimately not successful, but what was it known as?