Socialist Philipp Scheidemann served as the first chancellor of the Weimar Republic but resigned in June 1919 over his refusal to sign the Versailles Treaty.
Citation:
Editors. "Philipp Scheidemann forms cabinet in Germany".
The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=12664, accessed 19 June 2013.]