So many Biden +8 (or +7/+9) polls, which "coincidentally" is exactly the margin by which Democrats won the House popular vote in 2018. For all the "But 2018 was a D+8 year!1!" talk, it sure doesn’t look like the national environment has improved for Republicans since that election.
Also, the 538 aggregate has Democrats winning the House popular vote by... exactly 8 points (48.4%-40.4%).
This is a far more static election than people think.
I don't think it's that static. Many polls were a statistical tie until the last couple weeks or so, which were as good as anyone could ask for Biden- the bad coronavirus response by Trump finally registered with voters, Biden officially won the primary as Sanders dropped out, he got endorsed by the trio of Warren-Sanders-Obama, and he didn't have any gaffes. This will not be the same until November, and there's more than half a year. Who knows what happens by then?