Though an important function of the Latin American senates, the confirmation of presidential nominations has drawn little academic attention. This paper assesses empirically the way in which two Latin American upper chambers – the Argentine and Brazilian senates – made use of their confirmation prerogatives between 1989 and 2003, namely, if one of deference to the executive proposals or a more active role including both consultation and oversight. To do this, the article first analyses all nominations regarding outcome (confirmed, rejected and withdrawn) and length of process. Then, the similarities and differences are used to advance some explanatory hypotheses. Special attention is paid to the impact of political factors, mainly divided government, and institutional features, mainly the senates’ internal rules for the organization of the legislative work.
