Kamala Harris' net favorability is now +1. A massive 12 point shift in a week.
Meanwhile Trump's net favorability is -16 and declined 5 points from a week ago.
Vance's net favorability is -15 and declined 9 points from a week ago.
Biden's net favorability is -13 and improved 10 points from a week ago.
Most of Harris' vice presidential candidates are not well known to the electorate. So they'll be defined in the weeks ahead after she picks them for better or worse.
Vance was in a similar position, and America's introduction to him has been generally negative.