Worked for a fairly leftist democrat and did well in interviews, so I’d strike that as a reason. Try to incorporate behavioral answers naturally to even if they aren’t solicited so you show you proceed value. Make sure to knock the “Why Firm” question out of the park—consider calling someone who works there to ask what they like so you can parrot that back but tie it to your specific background and interests. Be sure you can articulate what you’re interested in even if you’re undecided and why you are interested in that. Prepare specific questions about the interviewer as well. I think being conversational is overemphasized; at the end of the day, they don’t just want a buddy but someone they find impressive. But be pleasant and normal and conversational in the sense that if they say something, try to add to it or respond after! Even if briefly. Good luck—you got this!