After the explosion of the USS Maine, the US public was whipped up into an anti-Spanish hysteria. Despite Spain's desire to avoid war and President William McKinley's distaste for war, the yellow press continued feeding the public's appetite for anti-Spanish news. Hawks like then-Assistant Secretary of the Navy Theodore Roosevelt loudly criticized the reluctant McKinley for being weak and afraid.
The Boston Tea Party was an event during which crates of tea were thrown from ships into the river at the Boston harbor. This was done as a sign of protest against the British government and initiated the Independence war.
To keep either house of Congress from becoming too powerful. (Gradpoint)
D settle in one place, they could then properly sustain themselves :)