I found an answers article to explain how to copy one value to another. This works great when I am using a single item field.

However, I am unable to copy a value from a drop down to a single item field. Please see the script I am running below. 

$('.state1 input').blur(function () {

        $('.fillState input').val($(this).val());

    });

        $('.fillState input').val($(this).val());

    });