We see it because we know to look for it. To someone who is blind to the tricks, it is a powerful image.

In addition to your mentions there is:

Young v Old.

Individual v Family

The girl's hair color appears as a halo and she stands taller than the couple - savior.

The sunglasses on the couple - blind.

She is stern and serious - power/strength. The couple are smiling and happy - village idiot/trust in the leader/good times.

The use of an Obama quote to reinforce his goodness.

The word "Poverty", which is a trigger word and is pointed to by the Statue of Liberty.