What rule was violated (doesn’t seem clear from article)?
Using video from floor proceedings in campaign/political commercials I believe.
FTA: House ethics rules prohibit members of Congress from using footage of official House proceedings for political purpos
~snip~
The letter that will be sent Thursday doubles down on the original complaint, targeting newly-released Spanish-language ads in Tampa, Denver, Miami and Las Vegas. The ads proclaim in Spanish: “In the face of Republicans, the President can’t do it alone. Read the plan. Stand together for more jobs.”