It’s not meant to move the needle now, but the authors acknowledge that.
Biden will never be able to satisfy Republicans on border policy. The real question is whether he can neutralize this issue among independents without alienating certain Democrats. These initial public opinion results suggest he may have achieved some of that, but it’s not a clear political win by any stretch,” said Patrick Murray, director of the independent Monmouth University Polling Institute.
It’s all about having a response when Trump says “Biden wants open borders” in the debate. Biden can say “We had a deal on that, you killed it because you thought keeping the border open would hurt me”.
Devolving to “No U” as an argument is kind of weak, but can still be effective with certain voters. This election will be decided by about 8% of voters on the margin in a handful of states, Biden is going after them specifically.