The ACC has a lot on its conference realignment plate right now. Conference realignment plates are basically just lists of cities by population, which school presidents and conference commissioners find to be the most delicious things in the world. The ACC has growing resentment among its football-first fan bases while a neighbor or two to the north is still, presumably, looking to get in.
The Connecticut Huskies more or less openly courted the ACC back when it looked like the Big East was about to explode, but perhaps they're being a little more subtle about it this time.
Connecticut's governor is calling for UConn and the Boston College Eagles to resume their rivalry. As Eagle In Atlanta points out, considering the ACC's nine-game schedule, that could be a clever call for the two to be in the same conference.
The long-standing theory is that the ACC wants to make its league as habitable as possible for Notre Dame, and is waiting to see whether the Irish show interest before taking UConn and somebody else. Rutgers has been the presumed Domer substitute, but now the Louisville Cardinals are also reportedly looking for an invite.