ABCNews -- The commissioner of the National Football League asked Congress to amend federal labor law in order to stop state laws from interfering with the NFL's drug testing policies reached during collective bargaining. In his second Capitol Hill visit in as many weeks, NFL Commissioner Roger Goodell testified to a House Energy and Commerce subcommittee that Williams vs. the NFL, a case pending in Minnesota state court better known as the StarCaps case, threatens to preempt the Labor Management Relations Act. Goodell argued that NFL players should not be permitted to use state law to overturn league-imposed suspensions because it might give teams located in those states an advantage. "Professional athletes and their collective bargaining...