Scott Walker: Building a Wall Along U.S. Border With Canada a 'Legitimate Issue'

The Wisconsin governor suggests that America's northern border might also need a wall.

Scott Walker, governor of Wisconsin, speaks during his presidential campaign announcement in Waukesha, Wisconsin, U.S., on Monday, July 13, 2015.

Photographer: Christopher Dilts/Bloomberg

Wisconsin Governor Scott Walker said in an interview broadcast Sunday that building a wall along the U.S. border with Canada is something worthy of further study.

"That is a legitimate issue for us to look at," the Republican presidential candidate said on NBC's Meet the Press program.

Walker said the issue was raised to him during a campaign event earlier this month in New Hampshire. He and other Republican presidential candidates have more commonly called for building a wall along the U.S. border with Mexico.

As he's fallen behind Republican front-runner Donald Trump in national polls and those in the critical state of Iowa, Walker has taken a more aggressive stance on the immigration issue, including backing the billionaire's calls to build a wall along the entire border with Mexico.

The United States has 5,525 miles of border with Canada and 1,989 miles with Mexico, according to U.S. Customs and Border Protection.

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