A safe state could still have one or more competitive house races.
2020: Republicans flipped four House seats in California and two in New York, while almost flipping one each in New Jersey and Illinois.
2018: Democrats flipped seats in Kansas, Oklahoma, South Carolina and Utah.
Hell, a Democrat flipped a House seat in Nebraska in 2014!
I think he means in terms of senatorial elections, but you make good points - there are a number of competitive congressional districts in NJ. I'd say if darklordoftech wants to help Democrats keep the House, he might want to help volunteer for, or donate to, Democrats in one of these districts, such as the 3rd, which under its current configuration supported Trump in 2020 (albeit very narrowly), and whose Democratic representative, Andy Kim, only narrowly prevailed in 2020. NJ07 is also pretty competitive. Of course if Democrats bluen up these districts in redistricting, which might well happen, then these districts will stay blue regardless, in which case (depending on how competitive it is after redistricting) you might volunteer for Van Drew's challenger in NJ02 (though I feel like if NJ03 and NJ07 are bluened it will come at the cost of making NJ02 redder and less competitive). If redistricting does indeed leave no competitive districts, then you can focus on volunteering in next-door PA for whoever the Democratic senate nominee is, but otherwise, Roll Roons is right: there can easily be competitive House seats in states that are uncompetitive, and NJ is a prime example of this.
