It's a given.
McConnell did it near the end of Obama's second term. That left open Circuit seats that Trump was able to fill.
Dems weren't up in arms at the time because they expected HRC to win.
Ninth Circuit is prime example.
I predict if Dems control the Senate not a single Judge or Admin. Official will be confirmed in final two years.
They will want those seats open if they win in 2028, and they will do whatever they think hurts the Trump Admin. ability to carry out policy.
Blocking all judges for 2 years would be another Democrat escalation of the downward spiral. True, McConnell escalated by holding the Scalia seat open for 9 months until after the election. But blocking *all* judges for 2 years would be escalating way beyond that.