Gold futures rose Tuesday to mark back-to-back session gains. The U.S. dollar weakened as the euro strengthened against the greenback, supporting dollar-denominated prices for the precious metal, said Chintan Karnani, chief market analyst at Insignia Consultants. There was "mild short covering as well, as the gold price managed to trade over $1,900," he said. "Leadership change concerns in the U.S. presidential election" also supported gold. December gold rose by $3.70, or 0.2%, to settle at $1,915.40 an ounce.