A drone maker backed by President Donald Trump’s two oldest sons is trying to sell to Gulf countries while they are under attack by Iran and dependent on the U.S. military led by their father. The sales drive by Florida-based Powerus – which announced a deal last month to bring aboard Eric Trump and Donald Trump Jr. – positions the company to potentially benefit from a war that their father began. “These countries are under enormous pressure to buy from the sons of the president so he will do what they want,” said Richard Painter, a former chief White House...