They even talked about it with Obama, but probably couldn't seeing as they found absolutely nothing to charge him with. They've suggested doing it for Benghazi, actions on imigration, and actions on access to school bathrooms, but you'd have to be all the way sold into the far right wing to think those were impeachable actions.
If the email thing came out after hillary became president, or if damning new information comes out after she's president, I could see them trying, but hopefully Hillary will keep clean enough that they can't do it no matter how much they want to.