In the senate, the most powerful part of the government, all senators were patricians (members of rome's richest and most important families), while the plebeians (the common people), to obtain political rights, formed their own assembly, the concillum plebus, and named their leaders tribunes. which is the best summary based on key words for the sentence? senators were most powerful, but plebeians formed their own assembly. senators were powerful patricians; commoners had their own assembly. patrician senators were rich and important, and also powerful; the common people had their political rights in assembly.