After an investigation surfaced more than 40 videos of people sleeping while using Tesla's driver-assistance features, one congressman is demanding action.

Rep. Raja Krishnamoorthi, D-Ill., said an NBC News investigation last month about napping drivers raised concerns about the safeguards meant to ensure they are paying attention.

WASHINGTON, Sept 10 : A Democratic lawmaker called on a U.S. auto safety agency on Thursday to take action to address misuse of Tesla’s Autopilot and Full Self-Driving systems,…