[2] His tenure coincided with a period of political instability in Hungary immediately after World War I, during which several successive governments ruled the country.

In 1894, Hadik was elected to the upper chamber of the Diet of Hungary, the House of Magnates, and he acted in the direction of separating the church and the state affairs from each other.

Having withdrawn from politics for a while after the end of this post, Hadik was appointed Minister of State in August 1917, in a process that continued during the World War I.

After the resignation of the Sándor Wekerle Cabinet on 23 October 1918, which had opposed reforms proposed by Austrian politicians to try to save the Austro-Hungarian Empire, Archduke Joseph, representing Emperor Karl in Hungary, appointed Hadik as prime minister instead of Mihály Károlyi, contrary to expectations, under the influence of Andrássy.

On 2 October 1893 in Seregélyes he married Alexandra Zichy de Zics et Vásonkeői (1873–1949), from whom four children were born: On 10 December 1933, Hadik died in Budapest.