GUATEMALA CITY (Reuters) -Guatemalan president-elect Bernardo Arevalo called on Wednesday on the president to seek the resignation of the attorney general, who is investigating Arevalo's party, amid accusations by his supporters that authorities are blocking a transition. Arevalo accused President Alejandro Giammattei of remaining silent and called on him in a letter to request that Attorney General Maria Consuelo Porras step down. Giammattei's office did not immediately respond to a late night request for comment but the prosecutors' office defended the investigation by Porras into allegations of electoral irregularities.