I forget. Does POTUS have the authority to call Congress to convene after they have begun a recess? imho, he COULD send the Marines around to collect them but that’s not exactly the way to win their cooperation.
Yes. But in the case of failure to consider nominees, IMO, it's not a winning proposition. They'd take it out of his hide, and he'd end up with a worse administration, and we'd end up with a worse field of judges.
He does have the power in call a special session. He DOES NOT have the power to send Marines to round them up. The Legislature is a separate but equal member to the Executive Branch, and they themselves are responsible for the roundup via respective sergeants at arms.
Now if this was Texas, where the governor can send the Texas Rangers to round them up - which has been done before - then it's a different story.