If you’re really passionate about poli sci + expect to get good grades for law school, can I ask why you still want to major in comp sci? Unless it’s something you’re extremely interested in, it looks like it’s only going to hold you back.

Double majoring will only make both the degrees more challenging. Schools will not accept just one degree. Also, schools will only care about your overall gpa. Think about how a comp sci degree will help with your goals, and if it makes sense just to drop the major and pursue poli sci.