(CNN) - MoveOn.org is targeting a Democratic senator Friday over her apparent opposition to the health care proposal President Obama has proposed.
In a radio ad airing in the New Orleans market, the liberal political action committee criticizes Louisiana Sen. Mary Landrieu for expressing opposition to legislation that would provide Americans with a choice of public health care.
"Why is Mary Landrieu opposing the president's plan to provide health care choices for all Americans, including the option to join a high quality public health insurance plan?" the ad's narrator says, noting the senator has received "$1.6 million in campaign contributions from the health care industry - the same industry that's now spending millions to stop the president's plan."
After initially signaling she would be in favor of a public option last year, Landrieu told reporters last week she was against any health care reform package that offered such a policy.
"I'm not open to a public option," she said. "However, I will remain open to a compromise, a full compromise. [A] public option is not something that I support. I don't think it's the right way to go."
But Landrieu, whose vote could be decisive in blocking a potential Republican filibuster against a health care bill, said she may still vote for a package that includes a public option.
"It would be unlikely, but I'm not saying no," she told reporters.
The radio spot is set to air through Wednesday.