I think it's important to realize that there is just no good way to accurately measure your chances of getting into grad school. So much of it has to do with things that are out of our control (funding, fit with faculty, whether faculty are accepting students, etc.). Also, I think it would behoove everyone to remember that high GRE/GPA aren't necessarily your ticket to grad school. Good programs look at the whole package. Sometimes applicants come off as arrogant or entitled because they think having X GRE or Y GPA automatically gets them a spot in a program. That attitude is really unattractive to adcoms who want students who are humble enough to be able to take advice and work well with other people in a collaborative environment. Those things are just as important, perhaps even more so, than some numbers on your application form. I have a pretty low GPA/GRE quant score, and I felt really bummed about my chances. But my adviser (who is the chair of our psych department) gave me this bit of advice, and I feel like it really helped during this process.
It's good that you have research experience, and if your mentors can attest to your creativity and people skills then I'd say that would have a greater impact than your quant scores (which seem fairly high). Lastly, though this might sound cheesy. I think finding a specific topic withing political psychology that you're really passionate about goes a long way when you're writing your statement of purpose. See if it's possible to come up with small, exploratory study of your topic of interest. It will help get your creative juices flowing, and also help you narrow down your POI when you apply to grad school. But most of all, GOOD LUCK!