New York City mayor Michael Bloomberg discusses proposals to curb gun violence; former Florida governor Jeb Bush talks about his "Immigration Wars" book; and Sen. Rob Portman (R-Ohio) and Rep. Chris Van Hollen (D-Md.) comment on talks they've had with the president. Also: Peggy Noonan, Carl Bernstein, Sally Quinn and Greg Tobin weigh in on the papal conclave.
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