Snap has its own brand to think about, it wouldn't bother trying to enter this arena. People don't talk politics on Snap, mainly because they skew younger and because it's photo-based, not text-based.
Cardi B did a video on Instagram about the government shutdown that got a lot of attention. I wouldn't count it out for Snapchat. Besides, no one thought Facebook was going to become a tool for politics when it first came out.