In the Idaho State Journal, Larry Gebhardt explains. A snippet:
The three monkeys are Mizaru, covering his eyes, who sees no evil; Kikazaru, covering his ears, who hears no evil; and Iwazaru, covering his mouth, who speaks no evil. The proverb and the image are often used to refer to a lack of moral responsibility on the part of people who refuse to acknowledge impropriety, looking the other way or feigning ignorance. Another name is code of silence.
Our congressional delegation and their staffs have issued statements in various media that indicate they are in the camp of Mizaru, Kikazaru and Iwazaru . . . .
In a tangentially related topic, Steven Lawson explores the enduring fascination with conspiracy theories in U. S. politics.