Boston is in a constitutional federal republic.
Boston -LRB- pronounced -LSB- bstn -RSB- -RRB- is the capital and most populous city of the Commonwealth of Massachusetts in the United States .	Commonwealth of Massachusetts	Commonwealth of Massachusetts	capital	list of capitals in the United States	most populous city	list of U.S. states' largest cities by population	Commonwealth	Commonwealth (U.S. state)	Massachusetts	Massachusetts	United States	United States
The United States of America -LRB- USA -RRB- , commonly known as the United States -LRB- U.S. -RRB- or America , is a constitutional federal republic composed of 50 states , a federal district , five major self-governing territories , and various possessions .	territories	Territories of the United States	constitutional	constitutional	federal republic	federal republic	states	U.S. state	federal district	Washington, D.C.	self-governing territories	Territories of the United States	various possessions	United States Minor Outlying Islands
