Hussen resigned because parliament rejected his Decree Laws in secret ballot.

Evidence

Because of the incomprehensible way these laws were voted down, I can assure you that my Government believes it absurd to go ahead with its heavy responsibilities in this dim atmosphere created by the National Assembly and, for this reason, my Government does not intend to remain in office since it is the government which should initiate and enact legislation. … Thus, I see that the only suitable step, your Excellency, is to submit my resignation. This itself is a rarity in a country full of problems and pressures, like Somalia, but my Government respects our parliamentary system and democracy. — Abdi Ismail Samatar, Africa’s First Democrats, 883

Categorization

• XREF: Hussen’s resort to resignation echoes Osman’s earlier willingness to step aside for constitutional principle; consistent with the ‘democratic leaders resign on principle’ pattern. — connects to: A parliamentary vote against proposed legislation triggered the prime minister’s resignation
• corroborated: 2 independent passages support this claim — Abdi Ismail Samatar, Africa’s First Democrats, 883

Broader Connections

• A parliamentary vote against proposed legislation triggered the prime minister’s resignation #corroborates (0.85)