Trump has turned down an invitation from the Harris campaign to debate her at her home, and reportedly said:

Two people have already tried to shoot me. I'm not going to risk it a third time.

A spokesperson explained:

Kamala Harris has already warned people that 'If somebody's breaking into my house, they're getting shot.'

So there's no way that candidate Trump is going to enter her home either through the front or back door and risk getting shot.

Anyway he's not doing another debate now that voting has started as that would be election interference.