Mark Levin explained this on his show. In the event there are two different slate of electors, let’s say, one slate for Gore and one for Bush.
The House would have voted for the Bush Slate and the Senate would have voted for the Gore Slate. In order to resolve the the deadlock, the matter would have gone back to the Governor of Florida, who was Jeb Bush, and Bush would have won.
I have a lot of respect for Levin, but if he said that, he was mistaken.