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This paper analyzes the conditions under which presidents dominate the legislative agenda. To address this issue we analyze the governmental period of 30 Latin American Presidents, developing a qualitative comparative analysis (QCA). The analysis highlights that the combination of a favorable institutional design and a division of Congress in different ideological blocs favors the Executive branch. Two other conditions, reliance on a parliamentary majority and the absence of party fragmentation, are combined with the above elements to ensure the predominance of the Executive. The findings of this comparative study are confirmed by a supplementary statistical analysis.