 Complete the following phrase:  In the 1948 election Calderón was again candidate for the presidency. The National Electoral Court provisionally declared the opposition candidate Otilio Ulate Blanco provisionally elected, but Calderón Guardia filed a fraud and presented to Congress a nullity of the presidential elections, although not of the legislative ones, in which his supporters had obtained a majority. On March 1, 1948, Congress -where the alliance of Calderonists and communists had a majority-, annulled the presidential elections. This caused a 