CEO donations lean Republican, though large-cap CEOs are more divided
Classifies CEOs into Republican vs Democrats based on the partisan leanings of PACs CEOs donate to. Finds Republicans significantly outnumber Democrats. Though its more even among women CEOs and large-cap CEOs. Unfortunately their industry classification is hopelessly outdated (doesn't include a tech sector, does include bus mfg). Energy is the most Republican sector.
I imagine the bigger impact is probably on the politics within parties, not between parties.