They probably still have a week or so to try and discourage Trump voters with skewed polls but eventually they will need to bring them back in line with reality.
Remember the "Reagan surge" the last weekend of the 1980 campaign. I believe Reagan was well ahead the whole time but as late as mid-October, they still had Carter leading by a significant amount.
Yes they have a little more time to bogus up polls to make it look like Hillary will be the winner. The talking heads yesterday were proclaiming no one wants to be with a loser.