I have less faith in public radio because my local station is always playing Lumosity adverts. I'm old enough to remember when the whole "sponsored by" thing being extended to full ads was a controversial development on US public radio. Now they're shilling outright scams and doing so with specific promises that are completely specious.
That said, there does appear to be some political leaning to NPR, but it's not nearly as bad as the cable news outlets.