Here's the thing about Our Revolution. It is organized as a c4 in order to hide its financial support. That puts certainly restraints on what it is allowed to do, but it seems to flout the law. Electioneering cannot be their primary purpose. They should lose exempt status.
Look at their home page. Two of their three goals are electoral politics. The strategy for the third is also electoral. 
When you see their issues, they frame winning their issues through electioneering. Look at their mission statement - electioneering
oh wow
This is from 2017 990, downloaded from Guidestar
Click the "Show Forms 990" button
guidestar.org/profile/81-326…
Click the "Show Forms 990" button
guidestar.org/profile/81-326…
