discovered and released posthumously as the Zweites Buch. At this time the SA began a period of deliberate antagonism to the Rotfront by marching into Communist strongholds and starting violent altercations. At the end of 1928, party membership was recorded at 130,000. In March 1929, Erich Ludendorff represented the Nazi Party in the Presidential elections. He earned 280,000 votes (1.1%), and was the only candidate to poll fewer than a million votes. The battles on the streets grew increasingly violent. After the Rotfront interrupted a speech by Hitler, the SA marched into the streets of Nuremberg and killed two bystanders. In a tit-for-tat action, the SA stormed a Rotfront meeting on 25 August and days later the Berlin headquarters of the Communist Party of Germany (KPD) itself. In September, Goebbels led his men into Neukölln, a KPD stronghold, and the two warring parties exchanged pistol and revolver fire. The German referendum of 1929 was important as it gained the Nazi Party recognition and credibility it had never had before. On the evening of 14 January 1930, at around ten o'clock, Horst Wessel was fatally shot in the face at point-blank range by two members of the KPD in Friedrichshain. The attack occurred after an argument with his landlady, who was a member of the KPD and contacted one of her Rotfront friends, Albert Hochter, who shot Wessel. Wessel had penned a song months before which would become a Nazi anthem as the Horst-Wessel-Lied. Goebbels seized upon the attack (and the weeks Wessel spent on his deathbed) to publicize the song, and the funeral was used as an anti-Communist propaganda opportunity for the Nazis. In May, Goebbels was convicted of "libeling" President Hindenburg and fined 800 marks. The conviction stemmed from a 1929 article by Goebbels in his newspaper Der Angriff. In June, Goebbels was charged with high treason by the prosecutor in Leipzig based on statements Goebbels had made in 1927, but after a four-month investigation it came to naught. Against this backdrop, Hitler's party gained a significant victory in the Reichstag, obtaining 107 seats (18.3%, 6,409,600 votes) in the September 1930 federal election. The Nazis thereby became the second-largest party in Germany, and as historian Joseph Bendersky notes, they essentially became the "dominant political force on the right". An unprecedented amount of money was thrown behind the campaign and political success increased the party's momentum as it recorded over