Must he sit there bland-faced and unmoving as they say what they say? Yes, of course. Judge Alito and the White House know they have to let these men talk. They don't want the senators to feel resentful or frustrated. They know each senator feels he has to play to his base. They know the senators are, by nature, like Conair 2000 hairdryers: They just love to blow, and hard. Fwwaaaaahhhhhhhhh.
And they know it is good, it is helpful, to let each senator reveal himself through his own words. I think senators feel that their words, when strung together, become little bridges. I think the White House feels that their words, when strung together, become little nooses.
Gotta love that last sentence. H/t Anchoress.