This is about doing the right thing for all the families who are here that have been torn apart by gun violence," President Obama declared on Monday, promoting his "common-sense gun safety reforms" in a speech at the University of Hartford, where the audience included parents of children who were murdered at Sandy Hook Elementary School in nearby Newtown last December. "This is not about politics." Unless you disagree with him. "There is only one thing that can stand in the way of change," Obama said, "and that's politics in Washington." Members of Congress have a simple choice to make,...