OTTAWA—Some Senate staffers are concerned that a new policy meant to protect them from workplace harassment is being blocked in the upper house by a handful of senators. But Sen. Marilou McPhedran, who is leading the charge against the new policy, has no intention of backing down. She contends the new policy would silence victims and is even worse than the existing one, which did little to protect staffers from sexual misconduct, harassment and bullying, resulting in scandals that have tarred the institution’s reputation in recent years. McPhedran was among a number of senators who said no last week when Sen. Raymonde Saint-Germain, chair of the human resources subcommittee that drafted the new policy, sought to have the existing policy repealed immediately so that the new one could be adopted. Amanda McLaren and James Campbell, who represent staffers on the Senate’s workplace health and safety committee, say they’re worried that …