E.J. Dionne Jr. at The Washington Post writes—The conservative evasion on guns: President Obama spoke some of the most important words of his tenure last week in response to the mass shooting at Umpqua Community College in Roseburg, Ore. “This is something we should politicize,” the president said. “It is relevant to our common life together, to the body politic.” [...] Politicians who go on about American greatness should be ashamed of saying that the United States is the one and only nation that can’t act effectively to solve a problem every other free and democratic country has contained. Rebecca Leber at The New Republic explains why she thinks New Hampshire Sen.