Maybe they could attack it from the angle of people with motor skill issues, etc. First legalize them for medical issues purposes and the next thing you know, Colorado Ave in COS is replete with knife shops!
In the Federal knife law it is legal for a one armed man to own a switchblade.
They make an exception for that disability.
Richard
APEX Gun Parts 719-481-2050 Order Line 3105 North Stone Avenue Colorado Springs, CO 80907 Mon-Fri 8am to 4:30pm MT www.apexgunparts.com