What a dumbass. If he would take roughly 15 minutes to read the constitution, he would find that Democrats aren’t in the majority as far as state delegations. Each state would get one vote. In that regard, Republicans have a comfortable majority in the number of state delegations.
I don’t believe the House vote on the challenges would be by state delegation. That seems to only apply to the House selecting the President. I have heard some people, including Lara Trump, make the same assumption that you made but it’s not clear what their legal basis for that is, if any.