If you have fixed policies like free trade (like the North American Free Trade Agreement [NAFTA]), then the Department of Commerce has very little role to play. If you have a strong and empowered Department of Commerce, then actions are politically driven instead of policy driven.
Either way big business/finance could control it. In the first case, it clearly is big business (or more likely finance). In the second case, it could be big business/finance or it could be a popular mandate. The popular mandate could be to protect union jobs. As it stands now, both political parties would oppose the second option! A Trump Department of Commerce would be used use to destroy union jobs. What would a Democratic Party Department of Commerce stand for?
In my opinion, there is no way of knowing from the Clinton Campaign or any other current Democratic Party activity.