Julian Zelizer : Sen. John McCain is poised to re-emerge as a major player in the next two years . Zelizer : As the new chairman of the influential Armed Services Committee , he will have much to say . He says McCain will be able to use new power to challenge Obama 's foreign policy agenda . McCain 's new platform will create a challenge , not only for the President , but for Hillary Clinton , assuming she runs for the presidency in 2016 . Zelizer : The Arizona Republican has been one of Obama's most vocal critics on national security issues and his opposition could help him win over some Democrats who are wary about supporting an administration that they see as too cozy with Israel
Julian Zelizer : Sen. John McCain is poised to re-emerge as a major player in the next two years . Zelizer : As the new chairman of the influential Armed Services Committee , he will have much to say . He says McCain will be able to use new power to challenge Obama 's foreign policy agenda . Zelizer : The Arizona Republican has been one of Obama's most vocal critics on national security issues and his opposition could help him win over some Democrats who are wary about supporting an administration that they see as too cozy with Israel