Vigorous political debate accompanied territorial expansion of the united states before the civil war because a) the texas territory was still under mexican control. b) most people in the united states opposed westward expansion. c) southern states refused to provide the troops necessary for such expansion. d) any new states admitted to the union might upset the sectional balance in congress.

D) any new states admitted to the Union might upset the sectional balance in Congress.

Explanation: Vigorous political debate accompanied territorial expansion of the United States before the Civil War because any new states admitted to the Union might upset the sectional balance in Congress. This "balance" was centered around the number of states that had slavery compared to the number of states that did not allow slavery.

President Kennedy did not like the spread of communism in Vietnam,

Explanation: When President Kennedy and the whole White House heard bout this news, they took action. They declared war on North Vietnam, by sending troops to Vietnam soil, sending money and weapons to fight Vietnam, Kennedy did not want the world to follow the steps of Communism, so that is why he acted so instantly and furiously against Vietnam!