He was elected president of the Berlin CDU ( both the Western and Eastern sections of the party ) .
After the war , Kaiser returned to politics and worked with Andreas Hermes to found the East Berlin division of the Christian Democratic Union ( CDU ) .
Kaiser was elected president of the CDU   ( both the Western and Eastern sections of the party ) .
After the war , Kaiser returned to politics and worked with Andreas Hermes to found the East Berlin division of the Christian Democratic Union ( CDU ) .