Which two neighboring countries in South America held presidential elections on October 27th, 2019?

On 27 October 2019, general elections were held to elect the president of Argentina, members of the national congress and the governors of provinces. Alberto Fernández won the presidency with 48.4% of total votes and incumbent president Mauricio Macri lost his re-election having 40.4% This difference was enough to make ballotage unnecessary. Alberto Fernandez belongs to the Justicialist Party while Macri created the centre-right Republican Proposal party in 2005. About 80.86% percent of registered voters went to the polls.

Uruguay elected the president, members of the Senate and House of Representatives on the same date. Nominees Daniel Martinez (39.17% votes) and Alberto Lacalle (28.59% votes) had to run on November 23th in the second round as ballotage system requires a second round if no candidate reaches 50%. Daniel Martinez belongs to Frente Amplio (center-left to left-wing coalition), while Luis Lacalle belongs to Partido Nacional (a traditional party founded in 1836). Lacalle became president with 50.98% of votes while Martínez had 49.02%.

Results in the parliamentary election regarding these parties were: FA won 13 seats in the Senate and 45 in the House of Representives, while Partido Nacional has 10 and 31 seats. The other runnning parties voted as follows: Partido Colorado (traditional party since 1836) has 4 seats in Senate and 13 in the House of Representives, Cabildo Abierto (right wing party founded in March, 2019) has 3 and 1 seats.