1. These are maps that have to do with the political government. They provide information on the boundaries and locations of countries, cities, towns, and states.They are not like the ordinary physical maps which focus on the geography that show mountains and valleys.
2. This refers to the total number or percentage of votes received by a candidate or party. This comes from all the voters from all the states.
3. This refer to votes coming from an institution called the Electoral College which comprised of representatives coming from different organizations,political parties and entities.
4. 1st district - Suzanne Bonamici
2nd - Greg Walden
3rd - Earl Blumenauer
4th - Peter DeFazio
5th - Kurt Schrader
Hope this helps :)