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McCain's health spurs talk of second seat for GOP to defend in Arizona

(Pablo Martinez Monsivais | The Associated Press) In this Nov. 13, 2017 file photo Sen. John McCain, R-Ariz., arrives on Capitol Hill in Washington.

(Pablo Martinez Monsivais | The Associated Press) In this Nov. 13, 2017 file photo Sen. John McCain, R-Ariz., arrives on Capitol Hill in Washington.