His UCRI candidates had done well; but the evening's big surprise, Andrés Framini's election as Governor of Buenos Aires Province (one of ten Peronists to win gubernatorial polls that night), proved unacceptable to the armed forces.

The stalemate lasted merely a day because most of the Army High Command were "Blues," whose preference of a "legal" solution to the vacuum was supported by most of the press and the Argentine public,[2] then enjoying Latin America's widest access to the media.

His prompt resignation from the UCRI and annulment of the March 18 mid-term elections did not immediately dispel the threat of a coup attempt, however, and mutinies in April and August resulted in the appointment of Army General Juan Carlos Onganía (who successfully rebelled against his "Red" superiors) as Head of the Military Joint Chiefs.

[5] Against opposition from former Buenos Aires Governor Oscar Alende, Frondizi and Perón initially agreed on a "National Popular Front," fielding a respected, moderately conservative publisher as the nominee, Vicente Solano Lima.

Tricked by a similar move in 1958, the military objected, however, leading to the brutal 1963 Argentine Navy Revolt on April 2, which cost 24 lives and effectively scuttled the Perón-Frondizi front.

These incidents led former President Pedro Aramburu run on his UDELPA ticket, thus hoping to provide those most likely to support a military coup a suitable, center-right choice instead.