It means his team is disjointed. Some one made the list. It was released, and now some other advisor is trying to change it. Internal politics and his campaign can't even manage that. How the heck is he going to manage real world politics? He's not... it will be a yuge disaster.....
This. Most definitely this.
Look, tie the three main threads of discussion on this topic today together.
1/ Trump releases a list. A pretty decent list on first reading. The judges chosen are pretty constitutionally conservative,
at a quick look.
2/ Trump himself most likely outsourced the making of the list. No bad thing - while he almost certainly knows some judges both professionally and personally, he'd have about as much idea NATIONALLY as anyone here. He relied on his team to do the research and the pre-vetting. Nothing wrong with that, in fact I prefer it. Less crony like.
3/ One of the judges on the list has a history of mocking Trump on twitter. Trump no like mockery of himself, either for ego reasons or simply protection of his brand.
4/ Trump is now looking at the whole list with suspicion because of this.
It doesn't speak well to his team, but not his fault (other than a guy is responsible for what his team puts out. The time to dispute and discuss this was before the list was released).
Edit to add: I bolded "At a quick look" because that's all I've done.