outside military bases. July 30 – Gallup poll reported 52% of Americans disapproved of Johnson's handling of the war, 41% thought the U.S. made a mistake in sending troops, and over 56% thought the U.S. was losing the war or at an impasse. On August 28, 1967, U.S. representative Tim Lee Carter (R-KY) stated before congress: "Let us now, while we are yet strong, bring our men home, every man jack of them. The Vietcong fight fiercely and tenaciously because it is their land and we are foreigners intervening in their civil war. If we must fight, let us fight in defense of our homeland and our own hemisphere." On September 20, over one thousand members of WSP rallied at the White House. The police used brutal tactics to try to limit it to 100 people (as per the law) or stop the demonstration, and the event tarnished the wholesome and nonviolent reputation of the WSP. In October 1967, Stop the Draft Week resulted in major clashes at the Oakland, California military induction center, and saw more than a thousand registrants return their draft cards in events across the country. The cards were delivered to the Justice Department on October 20. Singer/musician-activist Joan Baez, a longtime critic of the war in Vietnam, was among those arrested in the Oakland demonstrations. On October 18, 300 students at the University of Wisconsin–Madison attempted to prevent Dow Chemical Company, the maker of napalm, from holding a job fair on campus. The police eventually forced the demonstration to end, but Dow was banned from the campus. Three police officers and 65 students were injured in the event, dubbed "Dow Day". On October 21, 1967, the March on the Pentagon took place. A large demonstration organized by the National Mobilization Committee to End the War in Vietnam, a crowd of nearly 100,000 met at the Lincoln Memorial in Washington, D.C. and at least 30,000 people then marched to the Pentagon for another rally and an all night vigil. Some, including Abbie Hoffman, Jerry Rubin, and Allen Ginsberg, attempted to "exorcise" and "levitate" the building, while others engaged in civil disobedience on the steps of the Pentagon. These actions were interrupted by clashes with soldiers and police. In all, 647 arrests were made. When a plot to airdrop 10,000 flowers on the Pentagon was foiled by undercover agents, some of these flowers ended up being placed