Hamas’ objection could also compromise foreign support for the Palestinian Authority.

Fatah has nominated Salam Fayyad, the prime minister of the West Bank-based Palestinian Authority, to head the caretaker government.

Fayyad, a US-educated economist, enjoys the respect of foreign donors. His reappointment would ease Western concerns that donor money would fall into the hands of Hamas, which the West considers a terror organization.

Hamas official Salah Bardawil told The Associated Press on Sunday that “Hamas will not agree to grant Salam Fayyad the confidence to run the national unity government.”