Coalition presidentialism was considered to be a peculiar feature of the Brazilian political system for a long time. Today it is known that coalitions are common in presidential systems. However, little is known about Executive-Legislative relations in coalition presidentialism when the Executive has overwhelming legislative success and predominance, even in the case of high levels of fragmentation in both legislative houses. The objective of this research is to understand how the coalitions supporting the Brazilian executive operate by analyzing the legislative process, in other words, the law-making process in the National Congress. The plan is, therefore, to analyze how political parties that are members of the coalition participate in this process as well as understanding which strategies are adopted inside the legislative in order to guarantee party cohesion around the presidential agenda.