Putin has to keep Western support down and the best way of doing that is to have victories and denying Ukraine victories. It currently looks like the US is lowering support for Ukraine a lot. So that is helpfull. If Trump wins, that support is gone. From a European point of view Spain and Italy are not sending much support these days, the Netherlands who were a large supported just had a Putin puppet win a large number of seats and Hungary is blocking EU aid right now as well. Without that aid Ukraine is going to loose the war. Maybe it is enough for him to break throu later.