Doyle McManus, Los Angeles Times
If you're thinking that last week's tragedy in Newtown, Conn., makes it likely that Congress will soon pass stricter federal gun laws, remember this: People thought the same thing in 2011, after a gunman shot into a Tucson crowd, killing six and injuring others, including Gabrielle Giffords, one of the House of Representatives' own members.Public support for gun control tends to swell after a mass shooting. But then, just as quickly, it tends to ebb, and opponents are happy to wait the process out.

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