Wisconsin Gov. Scott Walker says a recent trip to Israel reinforces his belief that the United State must aggressively deal with terrorists abroad.

The potential 2016 presidential candidate spoke Saturday to Iowa Republicans in West Des Moines. Walker has just returned from a five-day trip to Israel, where he met with Prime Minister Benjamin Netanyahu and toured the region.

Walker criticized President Barack Obama's foreign policy, which he says has been to "draw a red line in the sand and allow people to cross it." Walker says the United States should deal with terrorism head on and "take the fight to them."

Walker was to appear later Saturday at a dinner hosted by the Republican Party of Iowa. Walker has yet to announce his 2016 plans.