The radio spread news quicker across different regions in the US.
The Mexican-American War, that happened between 1846 and 1848 was a result of the dispute over the territory of Texas, which back then was called the Republic of Texas, and the Mexican President still considered Texas as Mexico's province.
Many people could no longer afford to live there
The amount of credit-card debt a person has. Liability is responsibility of something (by law) and credit card debt is a type of unsecured liability.