Obama-Backing Unions Call for Penn’s Resignation

Change to Win chief says Clinton adviser should go after meeting with Colombian ambassador to discuss a free trade agreement.

"It’s time for Senator Hillary Clinton to send her vaunted ‘chief strategist’ Mark Penn packing..."

Teamsters leader says Penn's meeting calls into question Clinton’s own credibility on the trade pact, which Clinton opposes.

Penn says Monday's meeting was an "an error in judgment." Full statement here.

Campaign claims Penn was acting on behalf of his communications/lobbying firm, not the campaign.