The main element of design found in this poster is direction. This is seen through the steps, vertically, which leads the viewer’s eye towards the man running further upwards.
Line is used in this poster through the white, curved lines. This allows the viewers to draw their attention towards the text and information at the center of the page.
Although there are many elements of design seen through this poster, I think the most prominent one would be color. The three colors present, red, blue and yellow, create the values within Obama’s face, which is the main focus of this piece due to the scale.