Once again, a tragedy of horrific proportions has the nation talking about changing gun laws, discussions that in the past ultimately resulted in no change. Will this time be any different? And, with less than two weeks to go, what to make of talks between President Obama and House Speaker Boehner about the fiscal cliff? Plus: a new senator is named in South Carolina, while a venerable senator from Hawaii leaves us. NPR's Ken Rudin and Ron Elving review the week in politics.

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