The poster is targeting German workers, both intellectual and physical (represented respectively by "Workers of the Mind" and "Workers of the Fist"), encouraging them to vote for Hitler's National Socialist German Workers' Party (NSDAP) in the 1932 elections.
Hitler is targeting the German workers because he believed they were a crucial constituency that could be mobilized to support his political goals. The NSDAP portrayed itself as a party of the people, fighting against the establishment and the elite. Hitler saw the workers as a key group that could be won over by this message, as they were often marginalized and disenchanted with the political system.
The message of the poster is that Hitler and his party are the best choice for workers, both those who work with their minds and those who work with their hands. The use of the term "Front Soldier" suggests that Hitler and his party are willing to fight for the interests of workers and that they are willing to take bold action to achieve their goals.
The poster is designed to encourage workers to vote for Hitler and the NSDAP in the upcoming election. It appeals to their sense of identity as workers and suggests that the NSDAP is the party that best represents their interests. The use of the imperative "Vote for the Front Soldier / HITLER!" is intended to be a call to action, urging workers to take part in the political process and support Hitler's vision for Germany.