Yemen's rebel alliance is steadily weakening. Recently, former Yemeni President Ali Abdullah Saleh, who is leader of the General People's Congress, made public overtures to Saudi Arabia distancing himself from his Houthi allies. Though Saudi Arabia considers Saleh an enemy, it considers him less of a threat than the Houthi rebels, who were a problem for Saudi Arabia far before they struck a loose alignment with Saleh's GPC party in 2015. Saleh's moves against the Houthis stretch beyond words. He has reportedly refused to authorize the resupply of some Houthi arms. And GPC officials and Houthi officials have also clashed over the optimal structure of the Supreme Political Council, set up to govern Houthi-controlled areas in northern Yemen. When Houthi-appointed Prime Minister Aziz bin Habtoor resigned in April after only six months, reportedly at the GPC's nudging, it was just another sign of how tenuous the alliance in Sanaa is.