The Republican Leadership needs to announce that Weiner can no longer be trusted with sensitive information & must have his activities monitored or must leave the room when sensitive information is being discussed.
Weiner is a member of the Democrat leadership team.
The first thing to do is strip HIM and THEM from their access to any sensitive information. THEY can purge themselves easily by firing HIM.
Nancy Pelosi can displace Weiner in a second. Why hasn't she done so?