Newsweek's MBFC profile places them right-leaning with "mostly factual" reporting.
Their source "Cygnal"'s MBFC profile is actually rated more credibly than they are and left leaning. You can read the Cygnal Article directly if you want, I tried to find methodology in their 67 page report but all I could find was the "sample size: 1500" in tiny text at the bottom of the last page. I say they're pretty shit compared to PewResearch or other Pollsters.