On July 21, the date that President Biden withdrew, the RCP national average was Trump +3.1. Today it is Trump +1.7.
The last Pa. poll (PPP) exclusively pre-withdrawal (7/10-7/11) Trump was +6. The latest poll (Fox, 7/22-24), Trump v Harris is a tie.
Wisconsin pre-withdrawal, current
Trump +1, Trump +1
Michigan:
Trump +2, Tie
Georgia:
Trump +10, Trump +2
Arizona:
Trump +6, Trump +5
Nevada:
Trump +10-NA
North Carolina:
No poll since mid-February (Trump +9)
Kamala has improved on Biden's standing nationally and in every state except Wisconsin (margin unchanged) where there is current polling.
She has not chosen a vice presidential candidate yet. The Democratic national convention is Aug. 19-22. I would expect her to get a bump in the home state of the veep nominee and nationally after the convention.