Across a nation could be described as spanning the entirety of a country. Other phrases that could be used include "across the land", "nationwide", "throughout the country", "coast-to-coast", and "from sea to shining sea". These terms evoke the idea of something spreading and connecting people in every corner of a nation. It can also be phrased with more specific information, such as "state-to-state" or "border-to-border". Across a nation can describe a variety of aspects, including political sentiment, cultural trends, and economic development, and is a useful phrase in discussing national issues and policies.