It’s a small, but mighty sign: “Everyone is welcome here, except I.CE.” Katherine Duncan, owner of Katherine Anne Confections, fastened it proudly on her shop’s front door. “It was a no-brainer for me,” Duncan said on a recent Wednesday afternoon, hours after she put the sign up at the storefront on 3653 W. Irving Park Road. “I feel so helpless. With my business and my kids, I can’t escort students to and from school or other things like that. So it was like, well — what can we do?” In recent weeks, Chicago has seen an increase in Immigration and...