Fed's Bostic: We are prepared to step in with more policy help if needed

"We are committed to using all of our tools. They have some juice and we'll deploy them as necessary," Atlanta Fed President Raphael Bostic told CNBC's "Squawk Box" Tuesday. "The retail sales number gives us a sign, but there are lots of other things that we're going to learn between now and then and that will give us some guidance as to how we should think about our next move in terms of assets."