The federal government mean the same thing as national government

True.

Explanation:

Federal government is a system of dividing up power between a central national government and local state governments that are connected to one another by the national government. ... The 10th amendment of the Constitution, on the other hand, gave all other powers to the states.

popular sovereignty   influenced the declaration of independence because the colonists wanted to have freedom to do they wanted so they put into writing

the  wilmot proviso  was designed to eliminate  slavery  within the  landacquired as a result of the mexican war (1846-48). fearing the addition of a pro-slave territory, pennsylvania congressman david  wilmot proposedhis amendment to the bill.