One useful question to ask is, what is her tolerance for the quantitative/computational side of things?
Because a poli sci/public policy/econ/etc. major is good, but those things with a Big Data skillset can open up a whole additional realm of marketability. Examples would include Emory’s very quantitative Public Policy & Analysis major http://quantitative.emory.edu/for-undergraduate/degree-options/major-ppa/index.html , Penn State’s Social Data Analytics https://soda.la.psu.edu/ , IU’s Policy Analysis https://oneill.indiana.edu/undergraduate/degrees-majors/policy-analysis.html , Denison’s Data Analytics (students choose a concentration, which can be poli sci or a range of others) https://denison.edu/academics/data-analytics
Of course, it’s okay if she doesn’t want something this quantitative/computational, but it’s a good question to ask because these skills are in demand and can be a way in to some very interesting career settings related to her areas of interest.
Another type of major to consider is the interdisciplinary “PPE/PPL/PPEL” cluster of majors (Philosophy, Politics, Economics, Law). Good examples are seen at the Claremont Colleges, URichmond, Denison, Pitt, and the U of Arizona Honors College among others. The Honors major at Arizona is potentially a great “save the money for grad school” option. https://moralscience.arizona.edu/ppel-info