The Commander-in-Chief Test for Scott Walker and Rivals: Not Being Obama

The Republicans rarely mention Hillary Clinton at the South Carolina cattle call.

Scott Walker, governor of Wisconsin, pauses while speaking the the media during the South Carolina Freedom Summit hosted by Citizens United and Congressman Jeff Duncan in Greenville, South Carolina, U.S., on Saturday, May 9, 2015.

Photographer: Andrew Harrer/Bloomberg

In his first weeks as a presidential front-runner, Wisconsin Governor Scott Walker sometimes said that he could take on the Islamic State because he'd been tough enough to take on unions. After some pushback and mockery, he dropped that line. Saturday morning, at the South Carolina Freedom Summit in Greenville, Walker adopted the pose of a concerned citizen, worried about terrorism coming home.

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