If the Hillary stories about her email were relevant then this is too. This is at least the third story from different news sources that I've seen flagged to death on this topic.
Clinton's use of private email was an issue because she was dealing with classified information, and because she did not provide the State Department with copies of all of her work-related emails upon request. She is accused of committing at least two serious crimes.
Pence, to my knowledge, has not been accused of committing any crime here.