This summary is not the rule. The rule text controls.
Lawyers have to be careful about what they say publicly about judges and other legal officials. They cannot make false statements about a judge's honesty or qualifications if they know the statement is false, or if they don't bother to check whether it's true before saying it. This applies to sitting judges, other public legal officers, and people running for judicial or legal office.
The idea behind this rule is that lawyers have special knowledge about the legal system, so their public criticism of judges carries more weight than an average person's opinion. Because of this, lawyers are held to a higher standard when they speak out. They can still raise honest concerns or criticize judicial decisions, but they cannot spread lies or reckless accusations about a judge's character or fitness for office.
If a lawyer decides to run for judicial office themselves, they also have to follow the Code of Judicial Conduct's rules about campaign conduct. This means their campaign statements and behavior are held to the same standards expected of judges, not just the standards that normally apply to lawyers.