I am keeping the election at arms-length but here is what my gut feeling is right now - either it has to be totally clear that Trump has an overwhelming win on Nov 5, or Harris ends up taking office in January. Can't say how it all plays out but the current RPC map showing Harris down by 19 votes, the obvious eventuality is that Pennsylvania's 19 votes end up going to Harris for the win.

https://www.realclearpolling.com/maps/president/2024/no-toss-up/electoral-college