[3][4] At the age of 35, Boric became the youngest president ever elected in Chile and also set a record for receiving the highest number of votes in Chilean history.

On the left, the new coalition Apruebo Dignidad saw gains at the expense of the center-left New Social Pact (NPS), becoming the second largest bloc in the Chamber of Deputies.

Consequently, the newly elected Congress was split evenly between the combined left and right,[b] with the non-aligned congresspeople holding the balance of power.

[9] This represented a departure from the country's political history, which had repeatedly seen power bounce between center-right and center-left parties with little structural movement between presidents.

[10] In contrast, Boric, a member of the left-wing Apruebo Dignidad coalition, campaigned on a progressive message reflecting the ideas behind the 2019 protests.

Boric also supported the ongoing writing of a new Chilean constitution, while Kast repeatedly said he would interfere to stop its ratification if elected.

)[12][13] In the National Congress, the 155 members of the Chamber of Deputies are elected from 28 multi-member constituencies with between three and eight seats by party list proportional representation.

[16] The Apruebo Dignidad coalition decided its presidential candidate in the publicly-funded primaries held nationwide on 18 July 2021, won by lawmaker Gabriel Boric with 60% of the vote.

[33] Christian Democrat Senator Yasna Provoste won the primary election held by the New Social Pact center-left coalition (formerly Constituent Unity) on August 21, 2021, with over 60% of the vote and a turnout of around 150,000.

[70][71] Mónica Pérez Juan Manuel Astorga Cony Stipicic Carolina Urrejola Verónica Franco Nicolás Vergara Escenarios Hídricos 2030 Fundación Chile Fundación Avina Fundación Futuro Latinoamericano 21 October 2021[97] (University of Chile, Radio Cooperativa, Radio UChile, UChile TV) 1 November 2021[98] Sergio Campos Yasna Lewin Paula Molina Jennifer Abate Rodrigo Vergara Antonella Estévez Patricio López (Canal 13, El Desconcierto, Cobertura, CON-CIENCIA, Escazu Ahora Chile, Portada Soñada)5 November 2021[99] Andrea Obaid 11 November 2021[100] After the first round, candidates Sichel and Parisi endorsed Kast.

[103] Former President Michelle Bachelet returned to Chile from her role as UN Human Rights High Commissioner to formally endorse Boric.

Soon after these reports came in, local authorities and citizens in these municipalities took to social media to show Red Metropolitana de Movilidad bus terminals and parking decks full of unused city buses.

Leading figures from Boric's campaign, such as Izkia Siches cried foul, accusing the government of trying to help Kast win the election.

As a result, carpools were organized through social media, while private services like Uber and Cabify offered ride discounts for voters to travel to polling stations.

[137] Boric thanked Kast during his victory speech, saying "we must build bridges for our compatriots to live better, because that is the people of Chile's demand".

[138] Outgoing president Sebastián Piñera had a video call with president-elect Boric, which was broadcast live on TV and radio, complying with one of the country's electoral traditions since the transition to democracy.

[161] Bolsonaro's son Eduardo, who had supported Kast, had a harsher reaction, stating that Chile was set on a path similar to Maduro's Venezuela with Boric.

He mentioned the –8% drop that occurred in the Santiago Stock Exchange following the election and linked Boric to the violence that erupted in Chile in 2019.

Biden also sent through the president-elect his condolences for the death of 14-year old Valentina Orellana-Peralta, who was killed in a police shootout at Los Angeles, California on 23 December.

Boric later posted on his Twitter account about the conversation he had with President Biden, stating that "In addition to the shared joy for our respective electoral victories, we talked about common challenges such as fair trade, climate crisis and strengthening democracy.