John Fetterman, the Pennsylvania senator, faces mounting challenges as his chief of staff, Krysta Sinclair Juris, has resigned, marking another significant departure from his team. This follows a series of other staff members leaving his office, which has raised questions about his health and leadership style. Fetterman has defended his absences from committee meetings, attributing them to travel and family commitments, while also facing criticism over his strong support for Israel and recent interactions with former President Donald Trump.