Answer :
assuming that you're referring to the political cartoon about the senate in the period of 1800,
The sign above the senate represent Senator's confidence in their ability to represent the common citizen.
The sign above the senate represent Senator's confidence in their ability to represent the common citizen.
The sign on the Senate represents the senator's confidence in his ability to represent the common citizen.
Which means that the Senate is composed of senators, and they have to represent people directly.