Hamas is losing faith in the ability of the US to act as a mediator for a ceasefire in Gaza ahead of a new round of negotiations scheduled for this week, according to top Hamas official Osama Hamdan. Hamdan stated that Hamas will only participate if the talks focus on implementing the proposal put forth by President Joe Biden in May of this year, which has international approval. The Associated Press notes that the US presented this proposal to Israel, and Hamas agreed to it. However, Israel claimed that Biden’s speech did not fully align with the proposal itself. Subsequently, both sides sugg…