This is the sort of district that Dems really need to flip if they ever want to take back the House. Unfortunately, LoBiondo is very personally popular, and with good reason: he's basically the single most moderate Republican left in the House. (According to DW-NOMINATE, there is exactly one Republican who is considered more "liberal"- NJ-4's Chris Smith, who is somewhat moderate on economic issues but is also rabidly pro-life.)
Well, they took the House in 2006 and 2008 without it. When LoBiondo retires, Democrats will likely pick up the seat. It actually has a Democratic history(a Democrat held it from 1974 top 1994) and Democrats have a deep bench there.