WASHINGTON/DETROIT (Reuters) – U.S. President Donald Trump blasted General Motors Co and Ford Motor Co on Friday, calling on the two U.S. automakers to quickly build badly needed ventilators for COVID-19 patients and suggesting he might invoke the Defense Production Act to force the companies to move faster. GM and Ford separately announced this week that they are working with companies to help boost ventilator production. Many Democrats including New York Governor Andrew Cuomo have urged Trump to invoke the act, which grants the president the power to expand industrial production of key materials or products for national security and other reasons.