Susan Davis reports on the presidential race.

Amid resignation calls from labor leaders, Sen. Hillary Clinton’s chief strategist Mark Penn apologized Friday for meeting with the Colombian ambassador this week to discuss a trade agreement that Clinton opposes.

“The meeting was an error in judgment that will not be repeated and I am sorry for it. The senator’s well known opposition to this trade deal is clear and was not discussed,” he said in a statement released by Clinton’s presidential campaign.

[Mark Penn]
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Clinton strategist and public-relations specialist Mark Penn, pictured here after a Democratic debate in New Hampshire in January, met this week with Colombia’s ambassador to discuss a bilateral trade deal.

In a statement first provided to The Wall Street Journal, Teamsters General President Jim Hoffa — whose union has endorsed rival Sen. Barack Obama — said the account calls into question Clinton’s own credibility on the trade pact.

“How can we trust that a President Hillary Clinton would stand strong against this trade deal when her top adviser is being paid by Colombia to promote it?” Hoffa said. “To support this so-called ‘free trade agreement’ is anathema to the labor movement and to anyone who supports working people, social justice or the environment.”

The Wall Street Journal reported Friday that Penn met in his capacity as chief executive of Burson-Marsteller, a public relations and lobbying firm that is contracted to promote passage of the bilateral free-trade agreement that President Bush is expected to send to Capitol Hill next week despite opposition from Democrats and labor unions. Clinton and rival Sen. Barack Obama oppose the deal.

Penn’s apology is unlikely to resonate in the labor movement, leaders in which have previously expressed their distaste for the apparent conflicts in Penn’s personal business interests and Clinton’s politics.

Greg Tarpinian, executive director of Change to Win, which has endorsed Obama and represents a coalition of unions actively working against the trade pact, called on Penn to resign his campaign post.

“It’s time for Senator Hillary Clinton to send her vaunted ‘chief strategist’ Mark Penn packing — back to his job consulting for union busting corporations and anti-labor governments for good,” Tarpinian said in a statement.