Sadat dismantled much of the existing political machine and brought to trial a number of former government officials accused of criminal excesses during the Nasser era. Sadat tried to expand participation in the political process in the mid-1970s but later abandoned this effort. In the last years of his life, Egypt was wracked by violence arising from discontent with Sadat's rule and sectarian tensions, and it experienced a renewed measure of repression including extra judicial arrests.