"Thank you, dear Ecuador! The Citizen's Revolution has won overwhelmingly, despite the government's dirty campaigns and four years of brutal persecution and infamy," former President Rafael Correa tweeted.
"Today is our people's victory," added Correa, who supports the candidacy of the Arauz-Carlos Rabascall binomial since President Lenin Moreno's government prevented him from running for vice president.
Mexican researcher Tania Ortega joined the celebrations for Arauz's victory in Ecuador. "We are recovering Latin America with honest people committed to our peoples and organizations," she said.
Ecuador's former Foreign Minister under leftist President Rafael Correa, @GuillaumeLong, responds to the landslide victory of Correista candidate Andrés Arauz tonight in the first round of the election pic.twitter.com/oEHAFWgHFl
"Today, the people define its destiny. If Arauz wins, it will not only be a victory for Ecuador. It will also be a triumph for Latin American integration that we gestated with Hugo Chavez, Fidel Castro, Luis Inacio Lula da Silva, Nestor Kirchner, and Rafael Correa," Bolivia's former president Evo Morales tweeted.
From Argentina, the National Front of Peronist Groupings (FRENAP) President Marcelo Puella also congratulated the left-wing's victory in Ecuador.
"Mauricio Macri is gone from Argentina. Leftist President Luis Arce won in Bolivia. Today, Arauz won in Ecuador with a big advantage. Meanwhile, in Brazil, Lula is getting ready to return to political life," Puella tweeted.
"Little by little, the Great Homeland is being reassembled. It is time to make History again," he added.
#Ecuador | Protesters condemned the current US-backed gov't, demanding a return to the leftist Citizens' Revolution of ex-President Rafael Correa, represented by candidate Andres Arauz.