Funding of research by commercial companies, what is the sentiment in the USA?
Speaking from epidemiology as a field, with some dabbling in clinical and translational research:

Commercially funded research should absolutely show up on your CV (it does on mine), and it probably won't hurt you, especially in the early stages of your career. There is however definitely more prestige behind having NIH/NSF etc. funding, or foundation funding - several departments I've talked to have all said they prefer to see that. NIH funding especially is something of the "brass ring". Commercial funding isn't bad per se, but a notably dependence on it might have people wondering what is it about your work that isn't passing muster in the traditionally peer-reviewed federal funding system.

There's also some uncomfortableness around conflict of interest - industry-funded science doesn't have the best track record in terms of creating unbiased medical research, but they're also the only people who fund some research, so it will depend very heavily on what specific area you're in. I've worked in some areas where it gives people an uncomfortableness, and in others where nearly everyone has industry funding of some sort.