Translation/Interpretation/Caption Text:
According to Yoram Shamir this poster was published by the Herut Party's main adversary at the time of publication - The Mapai Party
The "key" of the Herut Party is a pistol and the shooter, who is assassinating a worker on his way to work, is identified by the Irgun/Herut Party logo printed on the cuff of the shirt. The subtext for this poster is that the Herut Party could not be trusted to hold elected office as they would continue their violent, pre-independence habits if elected to office.