Because you need to win the electoral college, instead of the popular vote, a candidate usually tries to campaign in states with lot of electoral votes, and usually refrains from going to smaller states.
It is the convivencia or the Coexistence. It is a scholarly speculation with respect to the time of Spanish history from the Muslim Umayyad success of Hispania in the mid-eighth century until the ejection of the Jews in 1492. It guarantees that in the distinctive Moorish Iberian kingdoms, the Muslims, Jews lived, and Christians in relative peace.
