Final answer:
President Nixon was indirectly involved in the Guatemalan genocide through US support of the Guatemalan military regimes, which carried out the genocide. However, the genocide was primarily carried out by the Guatemalan government and military.
Step-by-step explanation:
President Richard Nixon was involved in the Guatemalan genocide indirectly through the actions of the Central Intelligence Agency (CIA). In the early 1950s, the CIA supported a coup in Guatemala that overthrew the democratically elected government of Jacobo Árbenz. This coup eventually led to a series of military dictatorships in Guatemala, which were responsible for widespread human rights abuses and the genocide of indigenous Mayan communities.
The United States under Nixon's administration provided financial and political support to the Guatemalan military regimes, despite knowing about their violent and oppressive tactics. This support contributed to the continuation of the genocide in Guatemala. However, it is important to note that the Guatemalan genocide was primarily carried out by the Guatemalan government and military, and Nixon's involvement was more indirect and through broader US policies towards Latin America.