code review

You are selecting congress people and filtering on an attribute. In general it's more efficient to use the database to do this with a "where" - rather than selecting all congress people and filtering in ruby. So maybe do
``` self.congress_people.where('party = ?', 'R') ``` This will isssue a query like 

```
SELECT "congress_people".* FROM "congress_people"  WHERE "congress_people"."state_id" = $1 AND (party = 'R')  [["state_id", 7]]
```