 As a vocal supporter and zealous follower of orders from Russian Empire and Empress Catherine the Great he was one of the opponents of the Constitution of May 3.Together with his brother Szymon he commanded the forces of pro-Russian Targowica Confederation in the Grand Duchy of Lithuania, for a time becoming a "de facto" ruler of the Duchy (with the aid of the Russian Army).In the aftermath of the Polish–Russian War of 1792, at the Grodno Sejm that legalized the Second Partition of Poland, he argued that "If not Russia, if not Prussia, hence what?