Morning Consult has a swing state poll roundup Tuesday morning – conducted August 25-31, during and after the RNC, so the effects are unclear. The national poll details are in the same link.
Florida: Biden 49 – Trump 47
Pennsylvania: Biden 49 – Trump 45
North Carolina: Biden 49 – Trump 47
Ohio: Trump 50 – Biden 45
Minnesota: Biden 50 – Trump 43
Texas: Trump 48 – Biden 47
Colorado: Biden 51 – Trump 41
Wisconsin: Biden 52 – Trump 43
Michigan: Biden 52 – Trump 42
Georgia: Biden 49 – Trump 46
Arizona: Biden 52 – Trump 42