Katrina vanden Heuvel, the editor of The Nation magazine, told Chris Matthews today on Hardball that Sen. Barack Obama’s plagiarism scandal should not have been covered on the program because, she feels, it doesn’t matter to the common person. An incredulous Matthews responded that she should ask Sen. Joe Biden whether these kind of issues matter — a reference to Biden being forced to quit his bid for the presidency in 1987 after he plagiarised a speech. Pat Buchanan, a guest on the show, said that he felt this was a “bad day” for Obama, and that his character will likely be called into question more often now in the campaign.