What river did Texas and President Polk regard as the Texas-Mexico border​

Which is likely the most serious problem associated with an epidemic? 1. there are sometimes no cures to the diseases that spread. 2. people often die from the diseases that spread. 3. there are usually no ways to prevent people from getting ill. 4. people often don’t know they have a disease.

During the cold war, the united states was involved in certain regional conflicts due to fears later called the domino theory, which stated which concept?

How have a past president and our current president abused the powers granted to the president of the united states by the constitution and the people ?