Fever, aches , nausea and diarrhea. also they would get black spots on their checks. and lungs would be filled with liquid .
I'm assuming because this is under the history thread, it's dealing with the U.S. Senate. There are two main political parties in the U.S. which are Democratic and Republican- but there is also an Independent party, just not as big. Representatives are people who represent a certain party in, I believe, the Senate. So when it says "proportional", it's most likely referring to the fact there is an equal amount of representatives who are under the two big parties- the Democratic or Republican.
Slavery was the most significant cause of the controversy
The terms "trial of tears" and "the place where they cried" refer to the suffering of Native Americans affected by the Indian removal act. It is estimated that the five tribes lost 1 in 4 of their population to cholera, starvation, cold and exhaustion during the move west.
Hope i helped :)