Not sure I agree. If left at 4-4, it will get punted back to original deciding Judge, court order which Dems will sure to have the right Judge in their corner to rule in their favor.
Confirmation, if it happens, will be well after election day to preserve the 4-4 split to hear election challenges. Schumer can easily cause that to happen as he has invoked the “two hour rule”. The republicans want to get rid of Trump as badly as do the democrats.