Honestly I'm not even mad at Ren, it was to be expected. She was never gonna play "fair" in this election. She couldn't discourage Kyouka directly, so instead she opted to go after the people who'd support her and/or vote for her, especially government officials and representatives. She attempted this a bit with Yuuki (actually hilarious how she practically bulldozed him in the middle of the hallway), but was unsuccessful at discouraging him. Unfortunately she was more than successful at pressuring the Tohoku lady.
All in all, Ren and the Onmyou Agency are ready to fight tooth and nail to keep Ren's position.