I guess the pardons are no longer an issue. From the Philly debate in April when Clinton went after Obama for his Ayers connection:

OBAMA: Look, I’m going to have to respond to this just really quickly, but by Senator Clinton’s own vetting standards, I don’t think she would make it, since President Clinton pardoned or commuted the sentences of two members of the Weather Underground, which I think is a slightly more significant act…
(APPLAUSE)
GIBSON: Please.
OBAMA: … than me serving on a board with somebody for actions that he did 40 years ago.