Star Wars: Ashes of the Old Republic
Though ostensibly the same organization as the Republic Senate with a different name, the Imperial Senate is a shadow of its predecessor. Immediately after seizing power, Palpatine’s hold over the Core Systems made abolishing the Senate outright impossible. As his grip over the galaxy has tightened, however, he has managed to chip away at the power of the Senate, eroding their ability to affect bureaucratic appointments and oversee the military.
There are some intrepid Senators who still use the their office as a bully pulpit, vainly attempting to hold back the rising tide of oppression. So far, the Emperor has not deigned to crush their opposition.