Why did some us politicians believe that the louisiana purchase went against the us constitution?

a.

the president needed the senate’s approval before entering into treaties with foreign countries.

b.

the constitution clearly forbade the addition of new territories to the united states.

c.

the cost of the louisiana purchase was higher than allowed by the constitution.

d.

the constitution required treaties with foreign countries to be approved by a national vote.

Reynolds's political map of the united states shows free states, slave states, and areas open to be free or slave after the repeal of the missouri compromise. reynolds’s political map of the united states showing comparative area of the free and slave states following the repeal of the missouri compromise. southern states are gray. northern states and california are red. territories to the west are green. kansas is not filled. by reynolds [public domain], via wikimedia commons how is the compromise of 1850 reflected in the map?