I’m thinking about it like this.

Trump wins 2024 - the possibility of no 2026 elections is not insignificant.

Harris/Kelly win 2024 - Moderate risk the Dems lose 1 Senate seat in 2026.

If Kelly being on board helps Harris win swing states I think it’s worth it. I’d take the potential risk of a hostile Senate in the future over the impending risk of fascism in a few months.