Guatemala president Bernardo Arévalo, right, and Vice President Karin Herrera wave with their left hands in front of a blue background with white flowers during their inauguration.

Arévalo and Vice President Karin Herrera wave during their inauguration ceremony on Monday. Photo: Luis Echeverría/Bloomberg via Getty Images

Guatemalan President Bernardo Arévalo raises both arms in the air while outside a palace after being sworn in. It is nighttime. There are rows of white flowers in front of him.

Arévalo has vowed to end corruption in Guatemala but has faced an uphill battle since his shock victory in August. The attorney general's office has launched multiple investigations and successfully pushed for his party, Movimiento Semilla, to lose its certification. An appeal is pending. Photo: Luis Echeverría/Bloomberg via Getty Images

dozens of people are lined up behind barricades. they are waving guatemala flags.

Arévalo supporters wave a Guatemalan flag. The president has received major support from the country's Indigenous community, whom he has vowed to protect. Photo: Luis Echeverría/Bloomberg via Getty Images

Fireworks are seen in the nighttime sky behind Guatemala's National Palace, which is a white old building with several stories

Fireworks go off behind the National Palace in Guatemala City during Arévalo's inauguration. Photo: Luis Echeverría/Bloomberg via Getty Images

Josep Borrell, Luis Almagro and Samantha Power take a selfie at the inauguration of Guatemala President Bernardo Arévalo on Monday.

From left: Josep Borrell, high representative of the European Union for foreign affairs and security policy, Luis Almagro, secretary general of the Organization of American States, and Samantha Power, administrator of the United States Agency for International Development, take a selfie at Arévalo's inauguration in Guatemala City on Monday. Photo: Sandra Sebastián/picture alliance via Getty Images

Samuel Perez, the new head of the Guatemalan congress, stands clapping and smiling. He is wearing a baby blue tie, in the color of the Guatemalan flag.

The new president of the Guatemalan Congress, Samuel Pérez Álvarez, applauds before Arévalo's swearing-in. Pérez Álvarez, a member of Movimiento Semilla, was elected to the head of the congress on Sunday night, which helped clear the way for the inauguration to go forward after a nine-hour delay. Photo: Johan Ordóñez/AFP via Getty Images

Several people march in a street protesting in Guatemala City during the delays of new President Bernardo Arévalo's inauguration

Arévalo supporters march in his support on Sunday in Guatemala City. Photo: Camilo Freedman/picture alliance via Getty Images

Police surround a protester who is falling down, as other protesters pull them, during a clash.

Protests calling for Arévalo's inauguration turned contentious on Monday after lawmakers delayed it for nine hours. Arévalo has faced multiple legal maneuvers against him by establishment politicians. He has vowed to root out corruption. Photo: Camilo Freedman/picture alliance via Getty Images

Guatemalan lawmakers wearing suits and dress clothes yell and point fingers at each other during a congressional session in which the swearing-in of President Arévalo.

Lawmakers argue amid the tactics to delay Arévalo's inauguration on Monday in Guatemala City. Photo: María José Bonilla/AFP via Getty Images

Arévalo supporters gather in Guatemala City on Monday. Photo: Martin Bernetti/AFP via Getty Images

In photos: The chaotic inauguration of Guatemala's Bernardo Arévalo

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