All of the polls released today reaffirm the fact that this has probably been the most steady presidential election in forever. I don't think that Trump has lead in a single national poll from a reputable polling company (lol NOT Rasmussen or McLaughlin - which are Trump friendly garbage pollsters) in this election cycle.
In 2016, Hillary mostly lead nationally but you had a few national polls occasionally that showed Trump with a slim lead. Also, this time around, undecideds are 2-5%. In 2016, undecideds were around 14-20%. That's a huge difference.
Biden usually averages around 49-53%. Hillary usually averaged around 45-47%. That's big because even if every undecided voter broke for Trump (which is not going to happen), Biden would still most likely win the election.