What is the sentiment of this news? Please choose an answer from {strong negative/moderately negative/mildly negative/neutral/mildly positive/moderately positive/strong positive}.

A group of some 20 pro-privacy and worker organizations, including Public Citizen and Fight for the Future, urged U.S. antitrust enforcers Friday to stop Amazon.com from buying iRobot Corp, maker of the robotic vacuum cleaner Roomba.
mildly negative