Read the passage get a consensus of what it says
Sheesh this is a legit question 5 to buy
A topic that can be about a turning point in America, or its history, can be for example "How the emancipation proclamation paved way for equality". That is because many groups of citizens were inspired by this to fight for their own rights, groups like women or the lgbt population who asked for their own civil rights like the African-Americans had been guaranteed by amendments.
It's referencing the physical position of the country; specifically the term "landlocked" is what gives it away.
The republican in 1950's and 60's was much different than 1860's version.The FDR's new deal cost most African Americans to start moving to the Democrat.