In an interview with CNN's Jake Tapper on "State of the Union," the Republican presidential candidate said Obama hasn't offered enough support for police who are "overwhelmingly doing the right thing every day."
"He's praised them, but he's not speaking out about the fact that this rhetoric out there," Walker said.
"And when you've got people say, we have people say 'pigs in a blanket' at a rally, 'fry 'em up like bacon,'" he said. "That's the kind of thing you need to speak out about. You need to say that is wrong."
Walker was referring to a chant by protestors connected with the Black Lives Matter movement in Minnesota in late August
. The protestors, marching by the Minnesota State Fair, said they were trying to draw attention to police brutality against African-Americans.
Walker first connected Obama to police killings in a HotAir.com op-ed
in which he wrote that under Obama, "we've seen a rise in anti-police rhetoric instead of hope and change. We've seen racial tensions worsen and a tendency to use law enforcement as a scapegoat."
On Sunday, the Wisconsin governor pointed to a recent shooting in Texas.
"In Harris County there was a deputy sheriff who was shot 15 times -- 15 times, while he was filling up his gas tank. Why? Because the sheriff there said they believe that the suspect that went after him did so just because he was in uniform," Walker said.
"In our society we need leaders, not just in elected office, we need clergy and business and other leaders in our community to say enough is enough," he said. "These are the men and women we need to stand up and protect us. We need to make sure they have the training and they follow through on that training. We need to increase and improve relations for sure, but we cannot have it any more this idea that it's OK to go after law enforcement just because they wear the uniform and just because they have a badge."
Obama, who has created a task for on 21st century policing
to build ties between law enforcement and communities, said in May, "If we as a society don't do more to expand opportunity to everybody who's willing to work for it, then we'll end up seeing conflicts between law enforcement and residents."
"If we as a society aren't willing to deal honestly with issue of race, then we can't just expect police departments to solve these problems," he said at an appearance in Camden, New Jersey. "If communities are being isolated and segregated, without opportunity and without investment and without jobs -- if we politicians are simply ramping up long sentences for nonviolent drug crimes that end up devastating communities, we can't then ask the police to be the ones to solve the problem when there are no able-bodied men in the community, or kids are growing up without intact households."