General Discussion

Trump left the school in 1931 to become director of the Hoheren grafischen Fachschule in Berlin but in 1934 was to return as director, after both Tschichold and Renner were dismissed by the Nazis for 'subversive' typography.

https://www.google.co.uk/books/edition/An_A_Z_of_Type_Designers/jxV4qEolEo8C?hl=en&gbpv=1&dq=%22a-z%22+%22type+designers%22+%22trump%22+-ai&pg=PP180&printsec=frontcover

After the election of Hitler in Germany, all designers had to register with the Ministry of Culture, and all teaching posts were threatened for anyone who was sympathetic to communism. Soon after Tschichold had taken up a teaching post in Munich at the behest of Paul Renner, they were both denounced as "cultural Bolshevists". Ten days after the Nazis surged to power in March 1933, Tschichold and his wife were arrested. During the arrest, Soviet posters were found in his flat, casting him under suspicion of collaboration with communists. After six weeks a policeman somehow found him tickets for Switzerland, and he and his family managed to escape Nazi Germany in August 1933.

https://en.wikipedia.org/wiki/Jan_Tschichold

Even before 1932, Renner made his opposition to the Nazis very clear, notably in his book “Kulturbolschewismus?” (Cultural Bolshevism?). He was unable to find a German publisher, so it was published by his Swiss friend Eugen Rentsch. While designing his typeface Futura, Renner appeared at a public forum in Munich with several other German authors to speak out against the Nazis and other right-leaning parties who criticized anything that deviated from tradition as being "cultural bolshevism."[1]

https://en.wikipedia.org/wiki/Paul_Renner_%28type_designer%29