Biden has HATED Kamala since the moment she called him a racist at the Dem debates and disrespected Biden's KKK best friends.
These two people, Kamala/Biden, hate each other, always have. It is like Bill and Hillary, a marriage of convenience.
And, No one is more furious with rage at Kamala than Jill Biden for Kamala attacking her husband AND her chance to be First Lady.
Jill Biden/Joe Biden are not campaigning with Kamala and in many ways they are undermining her. There is no love between Kamala and Joe. I personally believe that Joe and Jill very much want Kamala to lose.