Why was this first compromise actually favoring the Republicans?

Either the 3/5ths compromise or the Bill of Rights

Explanation:

The Federalists wanted slaves to not count as citizens so they could have more congressional support. The Democratic-Republicans wanted them to count as a full person to gain more congressional support. They came to agree on them being slightly over half.

The Bill of Rights was a compromise because the Democratic-Republicans did not believe that the Constitution did a good job stating the rights of the people as they had a much stricter interpretation of it.

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.

the answer to your question is ( syngman rhee) have a great day