Oil prices were pushing to fresh 3½-year highs on Tuesday, as investors fretted over the future output from Iran and Venezuela, on the prospect of new U.S. sanctions on those countries. June West Texas Intermediate crude CLM8, +0.57% on the New York Mercantile Exchange rose 29 cents, or 0.4%, to $72.53 a barrel. On Monday, the contract closed at $72.24 a barrel, a gain of nearly 1.4%, which marked the highest finish for a front-month contract since Nov. 26, 2014. July Brent crude LCON8, +0.68% , the global benchmark, rose 21 cents, or 0.3%, to $79.43 a barrel, after closing up 71 cents to $79.22 a barrel on Monday. Oil prices rallied Monday over concerns that the U.S. will impose new sanctions on Venezuela, specifically on its oil industry, after President Nicolás Maduro won a second six-year term on Sunday. The election of Maduro, who has presided over the country’s economic collapse, was boycotted by the opposition and condemned as a sham by the U.S. and other countries.via