Brazilian dictatorial past has brought a pattern of “hyper-presidentialism,“ as a consequence, any abrupt change in people’s attitudes toward the president, as well as any sudden drop in popularity, can lead to a crisis that can put the whole political system in tension. The “winner-take-all“ model of presidentialism, combined with the history of authoritarianism in Latin America, which has created the image of a president with super-powers also ends up being a source of possible conflicts. In times of political or economic crisis, the President cannot govern without the support of Parliament, highly fragmented and captured, bringing new political instabilities and weakening democracy itself. The present study intends to point out the problems of the engine room of the Brazilian Constitution, especially defending that its presidential model weakens democracy.