Similarly, but chiefly in the United States, caretakers are individuals who fill seats in government temporarily without ambitions to continue to hold office on their own. This is particularly true with regard to United States senators who are appointed to office by the governor of their state following a vacancy created by the death or resignation of a sitting senator. Sometimes governors wish to run for the seat themselves in the next election but do not want to be accused of unfairness by arranging their own appointments in the interim. Also, sometimes they do not wish to be seen as taking sides within a group of party factions or prejudicing of a primary election by picking someone who is apt to become an active candidate for the position. At one time, widows of politicians were often selected as caretakers to succeed their late husbands; this custom is rarely exercised today, as it could be viewed by some as nepotism.