What is the litmus test for incumbents you choose to run against?

We have an incumbent scorecard where we do a first pass to review  the incumbent’s voting record. Based on their time served in office we look at bills like the Iran Deal, Keystone XL Pipeline Approval, HR676-Medicare for All, Inclusive Prosperity Act, number of bills co-sponsored and number of bills introduced, missed votes and so forth. Typically an incumbent would have to score a 20 out of 27 questions to be considered as someone to not run against. There are sometimes exceptions to consider and we also spend a lot of time listening to our supporters.