Basically Tribe denied repeatedly he was there to speak against Alito, even while speaking against Alito. Specter called him on it and Tribe floundered.
IMO, Tribe doesn't want to make a potential enemy of a future Supreme Court Justice, but he's expected by the Liberals as their premier objector to tear Alito down.
In the end he tried to walk the line of ripping Alito, but denying that is exactly what he had done and looked foolish.
The story that Jack White told about introducting his parents to Judge Alito was sweet, and telling. It was to be the highlight of his parents' day. When they left, they were convinced that meeting them had been the highlight of the Judge's day.
I am going to have to catch the rerun.