Iowa. Code. Jud. Cond. 51:2.3
Comment
[1] A judge who manifests bias or prejudice in a proceeding impairs the fairness of the proceeding and brings the judiciary into disrepute.
[2] Examples of manifestations of bias or prejudice include but are not limited to epithets; slurs; demeaning nicknames; negative stereotyping; attempted humor based upon stereotypes; threatening, intimidating, or hostile acts; suggestions of connections between race, ethnicity, or nationality and crime; insensitive statements about crimes against women; and irrelevant references to personal characteristics. Even facial expressions and body language can convey to parties and lawyers in the proceeding, jurors, the media, and others an appearance of bias or prejudice. A judge must avoid conduct that may reasonably be perceived as prejudiced or biased.
[3] Harassment, as referred to in paragraphs (B) and (C), is verbal or physical conduct that denigrates or shows hostility or aversion toward a person on bases such as race, sex, gender, religion, national origin, ethnicity, disability, age, sexual orientation, marital status, socioeconomic status, or political affiliation.
[4] Sexual harassment includes but is not limited to sexual advances, requests for sexual favors, and other verbal or physical conduct of a sexual nature that is unwelcome.