I don't know.
Pence was a grown-up, had integrity, experience, and maturity to go against Hillary. He was NOT a protectionist, however, and I don't know that he'd have carried PA, MI, and WI.
Pennsylvania was very close to being the tipping-point state in 2012 so a normal Republican could still flip it, plus New Hampshire may be flipped with a different Republican. Pence is not that strong a candidate, and may be too far to the right, but he probably is a stronger candidate than Trump, especially since Hillary was also very weak.