The third state of France consisted of ​

The Third Estate was made up of everyone else, from peasant farmers to the bourgeoisie. While the Second Estate was only 1% of the total population of France, the Third Estate was 96%, and had none of the rights and privileges of the other two estates.

whose power in the senate is equal to the power of the speaker of the house?

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.