The mom of the teenager who killed four students at a Michigan high school took the stand in her own trial where she’s facing four counts of involuntary manslaughter. Jennifer Crumbley testified it was her husband’s responsibility to store their son’s gun safely because she “just didn’t feel comfortable being in charge of that.” Her husband is scheduled to go on trial in early March on the same charges. CNN Chief Legal Analyst Laura Coates joins AC360 to discuss Crumbley's testimony and how she defended herself. Plus, in an exclusive CNN poll, former South Carolina Gov. Nikki Haley leads President Biden by 13 points in a general election head-to-head race. Former Democratic South Carolina House Member Bakari Sellers tells AC360 why Haley staying in the race helps Democrats.

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