Maybe you were thinking of the Democrats taking the House in 2018?
I can't imagine any practical circumstances under which a Democratic majority would have confirmed any of Trump's nominations as given.
- Gorsuch was nominated by Trump after Republicans refused to even vote on Obama's nominee Garland. I suspect Democrats would have insisted on a nominee of their choosing.
- Kavanaugh's nomination was polluted by baseless accusations of scandal. I take that as evidence there was almost no good will whatsoever among Democrats, who again I would have expected to counter with their own names. They certainly could not have confirmed Kavanaugh after the kinds of accusations they made.
- Barrett was nominated to replace Ginsburg, who was some kind of hero to many Democrats. That was a hard pill for them to swallow. Of the three, I can barely conceive that they might have conceded Barrett's nomination; but, more likely would have been another negotiation.
In all cases, I would have expected Democrats to take advantage of the "advise" part of the Senate's role to put short lists of their own to the president.