The citizenship clause of the fourteenth amendment is important because it?

There was a concern that with the increase of representation in Southern states once the three-fifths compromise was no longer in effect would make Southern states more powerful. The Republicans were afraid that the increased Democratic representation from the South would do away with many of the liberties granted to the African-Americans after the war. This Amendment was an attempt to discourage this. 

Corps of Discovery traveled from the central United States Northwest to the Pacific.

The states they passed through on their route on today's map would be:
Missouri
Iowa
Nebraska
South Dakota
North Dakota
Montana
Idaho
Washington State

Members of the Corps of Discovery was commissioned by Thomas Jefferson and included Meriwether Lewis and William Clark. The objective was to study the land and its offering to learn how the Louisiana Purchase could be profitable.