Mayorkas is the official most deserving of immediate impeachment. The things he has done are so egregious that holding impeachment hearings on him would be low lying fruit, so to speak. But the Republican congress simply will not do it. They don’t do accountability, even if only for largely ethical and symbolic reasons. And the Democrats know this better than anyone.
+1, yep, they should have started impeaching Mayorkis soon after taking the majority.