To what end? He's already been confirmed.
To what end? <-- the same as everything the Democrats do. Sow chaos, division, doubt, mistrust in the American system. If the Dems can't own it, then they just want to burn it down. She knows it will come to nothing, they always knew that, and they simply don't care. Just the smear of his name is good enough.
But it is true. McCain never saw a war he didn't like, and the Dems have never seen an investigation they didn't like. If the Dems could do it, they would have perpetual unending investigations into every Republican in the country, including you and me.