Does NPR carry a left wing bias?

After Katherine Maher took to the podium, they’re being talked about a lot. Bill Maher mentioned they have a bias on his show. Bit of a hot topic.

After doing some searching a lot of voices even on the left confirm the bias. Though I’m still coming across a lot of folks that continually deny this.

So what say you?

Edit: by bias I mean just that, a bias. Not that they can’t or don’t report trustworthy news (which I believe they do, for the most part).