He was part of the leadership of the German National People's Party (DNVP) from its 1918 founding until Alfred Hugenberg became leader in 1928.

[1] As a member of Hans Luther's coalition government, Schiele secured the restoration of agricultural and industrial protectionism with the tariff of 1925.

[3] He was persuaded by President Hindenburg to return as minister of food in Heinrich Brüning's cabinet.

[4] The Agricultural League under Schiele's leadership was criticised by Richard Walther Darré's Nazi agrarian apparatus.

[5] Unhappy with Hugenberg's leadership, Schiele left the DNVP and moved closer to the Conservative People's Party.