Superdelegate Matheson won't endorse until the primaries are over

Deseret News:

Rep. Jim Matheson, D-Utah, still hasn't made up his mind about which Democratic presidential candidate to support — even though the party's state chairman sees the race between Hillary Clinton and Barack Obama winding down.

"I really want to keep my powder dry until this process is done," Matheson, the only one of Utah's so-called superdelegates to the Democratic National Convention in August not committed to a candidate, told the Deseret News Wednesday. [...]

"Neither of the campaigns have been knocking at my door," Matheson said. "I have made it real clear that I'd like to watch this process play out. I am learning, I think all of us are learning, more about the candidates every day as this campaign rolls through all 50 states."

But unless Matheson is committed to voting for the candidate with the most pledged delegates at the end of the process, what's the point of waiting? What more are we learning?