According to the timeline, the stalemate of world war i began in

28th July, 1914

Several problems hit as major countries used in the early twentieth century. The previous century had left wounds that were difficult to heal.

Some countries were extremely unhappy with the sharing of Asia and Africa in the late nineteenth century. Germany and Italy, for example, had been left out of the neo-colonial process. Meanwhile, France and England can explore several colonies, rich in raw materials and with a large consumer market. The dissatisfaction of Italy and Germany in this context can be considered one of the causes of the Great War.

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.