‘With most experts saying that federal prosecutors can’t charge him, the House and Senate are the only entities that can hold the president himself to account. Unless 218 representatives and 67 senators agree that it’s time for him to leave, he’ll stay in office and avoid criminal prosecution. However, that does not mean special counsel Robert Mueller’s hands are tied. On the contrary, Mueller has broad authority to bring charges against basically anyone besides the president, up to and including Mike Pence if he’s found to have committed a crime.’
Source: Vox