President Donald Trump can make corporate America great, or at least more competitive, after he signed the tax bill into law Friday, according to a MarketWatch survey of the large multinational members of Dow Jones Industrial Average. Almost all the companies that responded applauded the legislation, mostly in the broadest sense and largely in corporate-speak without specifics, saying the lowered corporate tax rate would “allow” or “enhance” the ability of U.S.-headquartered companies to compete more fairly with overseas-based companies. The new tax law lowers the maximum corporate tax rate to 21% from 35%. Although a few companies said the new...