What is de jure segregation

Which of the following was an economic reason for the united states to declare war on spain in 1898?

Which beliefs and principles in the declaration of independence and the u.s. constitution create a national identity? a.) belief in god, allegiance to popular sovereignty, and states’ rights. b.) free enterprise system, free trade system, and separation of powers. c.) individual freedom, political equality, and unalienable rights. d.) powerful executive branch, judicial review, and bicameral legislature.

Restricting immigrants from entering a country may be based on what belief?