Exactly. From what I understand the GOP has been doing research on Applegate and found some questionable past activity. Maybe includes a restraining order but that is just memory. My feeling is that Applegate vs Issa could work out in a rematch if 2018 is a strong enough Democratic wave but it could end up closer to Love v Owens rematch in a neutral year. Though probably not as bad.
Yes:
http://www.latimes.com/politics/la-pol-ca-doug-applegate-allegations-20160913-snap-story.htmlI remember this revelation being posted to this forum as well. At least some thought he was done for. Obviously that wasn't the case, but I don't think it is insignificant going into the midterms.
Applegate caught Issa by surprise, and in a situation like that, a weaker candidate can do better. Now Issa will have had 2 years to prepare, and the Democratic challenger needs to have less weak spots, decent campaigning skills and at least the ability to raise enough money to compete with the House GOP caucus's wealthiest member. That's just my opinion, anyway.