He Was a Political Cartoonist
Dr. Seuss’s career began as a political cartoonist in 1941. He published over 400 cartoons in the New York newspaper “PM” in his entire career. His cartoons often scolded isolationists and were in support of America’s war effort. He also penned several anti-Japanese cartoons during World War II.
Source: Hyperallergic
According to filmmaker Ron Lamothe who made “The Political Dr. Seuss,” Geisel regretted making those ads. “ He was regretful about some of his cartoons for PM and some of the propaganda work he did for the Army Signal Corps .”