'I'm not going to panic' — Jim Cramer on Sunday's stock futures sell-off

Jim Cramer on Sunday night urged investors to keep a level head, even as U.S. stock futures plunged, extending last week's tariff-driven sell-off. "I'm not going to panic. I'm not going to say, 'Get out now.' I think you have to stay the course here," Jim said during a special broadcast on CNBC.…