From Newsweek :
he best example of this distortion, at the level of the Supreme Court, is the “partisan 5-4 ruling” canard. Left-leaning politicians consistently bring up this claim, even though over 80 percent  of cases end up with more than five votes.
- “Newsweek”: https://www.newsweek.com/myth-captured-courts-opinion-1512970
- “80 percent”: https://www.rstreet.org/2018/06/28/those-5-4-decisions-on-the-supreme-court-9-0-is-far-more-common/