Gun control advocates were on Capitol Hill Tuesday afternoon to ask members of Congress to pass legislation that would tighten gun-buying restrictions. It was part of the Mayors Against Illegal Guns campaign, led by New York Mayor Michael Bloomberg and Boston Mayor Tom Menino, to make it more difficult for convicted criminals and people found mentally ill from purchasing guns.—Governing.com Founded in 2006 with 15 mayors at its core, including former Seattle Mayor Greg Nickels, Mayors Against Illegal Guns has become a powerful voice in the gun prohibition movement, while hardly uttering a squeak about some of its own members...