What was the Delian League?

The Delian League was founded after the Persian War as a military organization, it was directed against the Achaemenid Empire but was then converted by the Athenian politician Pericles into being an Athenian empire. The Spartans started the Peloponnesian War (from 431-404) to force the Athenians to give up the Delian League. 

It is equal in the senate- each state has 2 senators

             The house of representative however is based on population size, this means that things would be equal in the senate but states with larger populations would have a bigger voice in the house of representatives

however, at that time, the state's differences in the population are not as great as they are today so the states with fewer populations had a greater voice in congress.  

back then greater voice-- today smaller voice