President Trump unleashed a pre-dawn tweet threat Friday addressing two major health-care moves the day before. “The Democrats’ ObamaCare is imploding,” Trump wrote. “Massive subsidy payments to their pet insurance companies has stopped. Dems should call me to fix!” Late Thursday, the White House confirmed reports that it would cut off subsidy payments to insurers selling coverage under the Affordable Care Act. Just hours earlier, Trump signed an executive order calling for new regulations from federal agencies to encourage cheaper and loosely regulated health-insurance plans.