Austria declared war on Serbia in a calculated response to the murder of Archduke Franz Ferdinand. There was much blame on both sides as to why war came about and what the true cause was, but the murder was the reason used.
"<span>because the trend of Chinese immigrants to large urban cities harmed the industrialization of the US economy" is the best option but there were wavering levels of truth to this. </span>
Most were responsible reformers but some like Carrie a nation were irresponsible agitators.
The 17th amendment was ratified in 1913. So before the ratification, the senators were chosen by the states legislature, but after the ratification it was a popular vote that disided the senator.