Oil prices extended gains on Tuesday as US President Donald Trump heightened his rhetoric against Iran, threatening stronger action if the country fails to reopen the Strait of Hormuz, a key global oil transit chokepoint. Brent crude futures rose 57 cents, or 0.5%, to $110.34 a barrel by 1202 GMT, while US West Texas Intermediate crude futures were up $1.26, or 1.1%, at $113.67. Trump, has