Many people argue that the Cenozoic era should not be called the "Age of Mammals" because there were many other species, such as birds and insects, and many plants were as numerous as mammals were at the time. So they argue the name of the era giving reasons such as these - why should it be named after mammals when there were other animals and birds and plants roaming the Earth as much as they did?
There isn't a specific name for when Congress doesn't confirm the presidential nominee to the Supreme Court
Transportation. It's easier to get around than walking through dense grass and trees.
it’s the Kent state massacre
A. The Nullification Crisis led to the promotion of federal power over states' rights.
It was actually outlined in the constitution that states could nullify laws, etc., they deemed that were wrong. However, when South Carolina decided to nullify a law, Andrew Jackson put a stop to it, causing the crisis and almost starting the war then and there. When, prior to the event, states still had a substantial amount of power, President Jackson's response caused states' rights to diminish under the authority of the federal government.