In january 2011, democratic u. s. representative gabrielle giffords was shot in the head and wounded. questions were raised about whether the gunman, jared loughner, had been influenced by

The answer is the violent imagery and rhetoric used by conservative politicians. Investigators recognized the gunman as Jared Lee Loughner, age 22, and said that he was declining to collaborate with the specialists and had appealed his Fifth Amendment privileges. Mr. Loughner was in safekeeping with the Federal Bureau of Investigation on Saturday evening, the Pima County sheriff’s office held.

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.