The hostages-ceasefire negotiations have broken down because of insufficient pressure from the Biden administration on Hamas’s patrons in Qatar. 
The failure of the negotiations should be attributed to Qatar’s lack of action against the Hamas leaders who are living in luxury in Doha. 
 
Qatar is not doing anything because it is not under any serious pressure from the Biden administration. 
 
Has the Biden administration considered using the threat of withdrawing the US Central Command from Qatar’s Al-Udeid Air Base from to pressure the Gulf state’s rulers into convincing their friends in Hamas to free all the hostages?