He was reelected to the lower chamber in the June 1918 election, becoming President of the body and, due to the rapid political developments, the first person to hold this office in the history of Greater Romania. The year also brought his participation alongside Allied envoys in the 360th anniversary of Michael the Brave's birth. On 1 December, later celebrated as Great Union Day, Iorga was participant in a seminal event of the union with Transylvania, as one of several thousand Romanians who gathered in Alba Iulia to demand union on the basis of self-determination. Despite these successes, Iorga was reportedly snubbed by King Ferdinand, and only left to rely on Brătianu for support. Although he was not invited to attend the Paris Peace Conference, he supported Queen Marie in her role of informal negotiatior for Romania, and cemented his friendship with her.