Hitler's talent as an orator, and his ability to draw new members, combined with his characteristic ruthlessness, soon made him the dominant figure. However, while Hitler and Eckart were on a fundraising trip to Berlin in June 1921, a mutiny broke out within the party in Munich. Members of its executive committee wanted to merge with the rival German Socialist Party (DSP).  Upon returning to Munich on 11 July, Hitler angrily tendered his resignation. The committee members realised that his resignation would mean the end of the party.  Hitler announced he would rejoin on the condition that he would replace Drexler as party chairman, and that the party headquarters would remain in Munich.  The committee agreed, and he rejoined the party on 26 July as member 3,680. Hitler continued to face some opposition within the NSDAP: Opponents of Hitler had Hermann Esser expelled from the party, and they printed 3,000 copies of a pamphlet attacking Hitler as a traitor to the party.  In the following days, Hitler spoke to several packed houses and defended himself and Esser, to thunderous applause.