The odds are getting very long for the 'Crats to hold the House - they would have to win most of the remaining undecided races where GOP currently leads, which has not been the trend. 'Crats mail in more by a wide margin and are counted already, so the uncounted votes from the polls/drop boxes tend to be more Republican.  

Worse for the 'Crats, it is appearing increasingly likely that the margin will be more than a few seats. That means less chance for "gang of x" dirty dealings with RINOs to pass legislation unpopular with the majority GOP reps.