An advisor to Clinton resigned Thursday over his comments on Obama.
WASHINGTON (CNN) - A top advisor to Hillary Clinton has resigned his position with her campaign after suggesting rival Barack Obama's admission of drug use could hinder his chances of winning a general election matchup.
Bill Shaheen, a co-chairman of Clinton's New Hampshire campaign, said in an issued statement, "I made a mistake and in light of what happened, I have made the personal decision that I will step down as the co-chair of the Hillary for President campaign."
"This election is too important and we must all get back to electing the best qualified candidate who has the record of making change happen in this country," he added. "That candidate is Hillary Clinton.”
Reacting to the news, Obama's chief campaign strategist David Axelrod told CNN's Jessica Yellin he thinks it was a "good decision."
"I think what he did was beyond the pale," Axelrod said. "He injected something into the campaign that didn't belong. We didn't ask for him to resign. I think it was a good idea. Hopefully it will send a signal you can't do these kinds of things."
"We believe the American people can sort out these issues and we weren't lying awake at nights worrying what Bill Shaheen said," Axelrod continued. "Maybe the Clinton campaign was."
Earlier: Aide: Clinton apologizes to Obama