Question

Why did some Americans oppose U.S. expansion?

Claimed territories did not receive constitutional protections
- The United States did not have a strong navy or army.
There were no economic advantages to expansionism.​

Answer 1

Some claimed territories did not receive constitutional protections.

Step-by-step explanation:

Answer 2

Although the United States promised it would not annex Cuba after victory, it did ... the United States acquired Puerto Rico, Guam, and the Philippines as territories. ... the dispute, the United States declared war against Spain on April 11, 1898. ... it did force Cubans to recognize American control in their new Constitution.