My wife was a staunch leftist liberal when I first met her. She told me when we were first dating, no guns, no motorcycles and don't even think about going into law enforcement. Today, she owns her own handgun, goes to the range with me on occasion, has volunteered to help me hunt, rides on the back of my motorcycle and loves it, and I'm with my county's Sheriff's Reserve division.
So, how you might ask did this transformation happen. Slowly, with patience, due diligence, time, and not being a pestering ass. (By time, I'm talking a few years)
I would leave my handgun on the end table between where we sit while watching TV. I noticed her looking at it from time to time. Every so often she'd ask about a particular feature on the handgun. I would mute the TV, empty the handgun, show to her that it was empty (even though at first she didn't know what she was looking at) and then answer her question, and only her question. Each time, she seemed satisfied with the answer and she'd un-mute the TV and go about her business. Eventually, it got to the point where I felt comfortable to ask if she wanted to try to rack the slide on my handgun. She seemed interested. Again, I emptied the gun; by this time she knew how to check if it was empty, and showed her how. I then started dropping hints that since there is a firearm in the house she probably should know how to use it. She agreed, but not wholeheartedly. I later dropped hints about a "Girls and Guns" class that my range offered. She seemed interested. After awhile she asked about the class on her own. I didn't hesitate, I signed her up for it. Turns out she's an excellent shot. Two months later she had her own firearm.
You can't push her. It has to be on her time and when she's comfortable. The more that she sees you are safe, and the more she sees it as a tool, the more she will become desensitized to it. Be patient with her.
Today, she gets just as upset with the political arena as I do, she understand the Constitution, she understands what are rights are about and I'm proud that she has turned some of her leftist family members around with nothing but truth, reason and logic.