McDonald shows that perceptions of compassion in candidates for public office are based on the number and intensity of commonalities that bind citizens to political leaders. Commonalities can come in many forms, such as a shared experience ("I've been through what you've been through"), a shared emotion ("I feel the way you feel"), or a shared identity ("I am who you are"). Compassion is conceptualized through the lens of self-interest. Compassion may be universal, such as when candidates convey empathy to all individuals who are struggling. Or compassion may be exclusionary, such as when candidates express a preference for some groups over others. Thus, the way campaigns choose to wield compassion in their messaging strategies has important implications not only for election outcomes, but for American political polarization as well.