The defectors the article is talking about are Republican senators. The author links to the piece about the trap:

When I followed up, asking whether Republican senators had voiced any qualms about Patel, he said they had “at first” but that he hadn’t followed up because he’s being “very careful” in a “delicate period of time.”

This is the trap Democrats keep falling into. They don’t want to come out against a Trump nominee too aggressively, out of fear of alienating Republican fence-sitters. But in the same breath, they’ll tell you that Republicans aren’t actually open to listening to what they say, as they’re determined to pass Trump’s fealty tests. So Democrats land in a place where they can neither mount an aggressive campaign, perhaps at least incurring some cost to the Republicans senators and the Trump administration, nor have any hope of swaying their GOP colleagues to their side.

Instead of worrying about the sensitivities of their colleagues, go all out against the nominee so they think confirming the nominee is an electoral risk. It’s a play to their voters.