How did the arrival of so many immigrants affect u. s cities?

Why were the numbering trials held from 1945 to 1946 ?

Ineed asap! ! what is the name of the system in which each branch of the u. s government can limit the actions of the other branches? a. perpetual union b. division of powers c. cooperative federalism d. checks and balances

What document does the second paragraph of the declaration of independence echo