The Clinton campaign, which normally is eager to hit the Obama campaign from every possible angle, is firmly refusing to make any comment on the Rev. Jeremiah Wright matter. Asked about it on a conference call a few moments ago, Clinton spokesman Howard Wolfson answered, “That will be something for voters to assess, and I don’t have any comment on it beyond that.” Asked a second time, Wolfson said, “I would give you the same answer. Voters will have to make an assessment about that and come to a judgment.”

Yesterday, during another conference call, Clinton strategist Mark Penn said that Obama faces a number of “difficult issues.” Penn listed the Austan Goolsbee matter, the Samantha Power matter, and the Tony Rezko affair. No word on Wright. Asked later in the call to elaborate, Penn also demurred.