How you say this is as important as the words themselves. It's easy for stress to enter your voice, making you sound defensive or hostile. Don't let that happen. As is so often the case when dealing with sensitive topics, being relaxed, calm, and confident is the key to success.
Usually, when people complain about office politics they're talking about who's backstabbing whom. All in all, that's probably safer territory than what you're having to deal with.
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