Mary Trump is calling for an investigation into a family member. She singled out Jared Kushner as one of the first people Democrats should focus on, calling him “deeply corrupt” while renewing her attacks on House Democratic leader Hakeem Jeffries for meeting with him.In a post on her Substack, The Good in Us, the president’s niece argued that Democrats’ return to power in Congress should bring economic relief alongside the investigations. In wh…