WASHINGTON — Biden administration officials have discussed potentially negotiating a unilateral deal with Hamas to secure the release of five Americans being held hostage in Gaza if current cease-fire talks involving Israel fail, according to two current senior U.S. officials and two former senior U.S. officials. 

Such negotiations would not include Israel and would be conducted through Qatari interlocutors, as current talks have been, said the officials, all of whom have been…