The survey of 1,695 registered voters conducted Sept. 3-6 shows support for Trump at 48% against 47% for Harris, within the three-percentage point margin of error.
Congress returns this week facing the traditional election year push and pull of members wanting to get out of Washington as quickly as possible while doing just enough to avoid a government shutdown.
With just eight weeks to election day and early voting in Pennsylvania beginning Sept. 16, there's little time for either candidate to recover from a bad performance.
Debates can be consequential, as this election season has already shown. And Tuesday could wind up being the only debate between Harris and Trump before the November election.
Despite the growing diagnosis of autism, experts and advocates have bemoaned glaring gaps in services to meet the mental health needs of autistic youth.