that the Parker plaintiffs "faced repeated attempts by the NRA to derail the litigation." He also stated that "The N.R.A.'s interference in this process set us back and almost killed the case. It was a very acrimonious relationship." Wayne LaPierre, the NRA's chief executive officer, confirmed the NRA's misgivings. "There was a real dispute on our side among the constitutional scholars about whether there was a majority of justices on the Supreme Court who would support the Constitution as written," Mr. LaPierre said. Both Levy and LaPierre said the NRA and Mr. Levy's team were now on good terms. Elaine McArdle wrote in the Harvard Law Bulletin: "If Parker is the long-awaited "clean" case, one reason may be that proponents of the individual-rights view of the Second Amendment – including the National Rifle Association, which filed an amicus brief in the case – have learned from earlier defeats, and crafted strategies to maximize the chances of Supreme Court review." The NRA did eventually support the litigation by filing an amicus brief with the Court arguing that the plaintiffs in Parker had standing to sue and that the D.C. ban was unconstitutional under the Second Amendment. Chris Cox, executive director of the NRA's Institute for Legislative Action, had indicated support of federal legislation which would repeal the D.C. gun ban. Opponents of the legislation argued that this would have rendered the Parker case moot, and would have effectively eliminated the possibility that the case would be heard by the Supreme Court. Immediately after the Supreme Court's ruling, the NRA filed a lawsuit against the city of Chicago over its handgun ban, followed the next day by a lawsuit against the city of San Francisco over its ban of handguns in public housing. Brady Campaign to Prevent Gun Violence The Brady Campaign to Prevent Gun Violence opposed the arguments made by the plaintiffs in Parker, and filed amicus curiae against those arguments in both the District and Circuit courts. Paul Helmke, the president of the Brady Campaign, suggested to D.C. before the Court granted certiorari that it modify its gun laws rather than appeal to the Supreme Court. Helmke has written that if the Supreme Court upholds the Circuit court ruling, it "could lead to all current and proposed firearms laws being called into question." After the ruling, Paul Helmke stated that, "the classic 'slippery slope' argument", "that even modest gun control