Complex sentence: By his exposure of the Wilson scandal, and by his personal plain speaking, Clemenceau contributed largely to Jules Grévy's resignation of the presidency in 1887, having himself declined Grévy's request to form a cabinet on the downfall of Maurice Rouvier's Cabinet.
Split into simpler sentences: By his exposure of the Wilson scandal, and by his personal plain speaking, Clemenceau contributed largely to Jules Grévy's resignation of the presidency in 1887. He had declined Grévy's request to form a cabinet on the downfall of Maurice Rouvier's Cabinet.