       WhoWeb.MemberView.parse_member_district("B001300", "House")
       >>> "44"
   """
-  @spec parse_member_district(String.t(), String.t()) :: String.t()
+  @spec parse_member_district(String.t(), String.t()) :: nil | non_neg_integer
   def parse_member_district(member, "Senate"), do: nil
   def parse_member_district(member, "House") do
     at_large =

        |> Map.get("roles")
        |> Enum.fetch!(0)
        |> Map.get("district")
    end
  end


defmodule WhoWeb.MemberView do
  @moduledoc """
    Helper methods to parse and populate %MemberPresenter{} fields.
  """

  use WhoWeb, :view

  @doc """
