Rick, it only goes to the US House IF the election is "undecided" by the Electoral College. Easiest example would be a "tie" (which happened in 1800), but it has also happened when there were more than two candidates and none of them received a majority (1824 & 1876).
In this case, I think the scenario hoped for (by Trumpers) would be if some of the States were unable to "call" their election by that date (ie, tied up in court or the election results tossed out because of overwhelming fraud -- ie, the Dominion voting machines) and thus unable to ratify a winner and appoint his representatives in the College. If no candidate receives over 50% of the Electoral College votes, the decision moves into the US House.
So, is there fraud? Is the fraud so overwhelming that a Court (likely to go to the SCOTUS) will nullify the election results in one of more States? His lawyers claim this is the case due to the Dominion voting machines. (I've uploaded videos to this claim from Trump's lady lawyer and Rudy G. made the same claim in the last 24 hours on Fox.)
YMMV