Oil prices continued to weaken Monday, building on Friday’s slide as worries about increased production were amplified by the potential of Chinese tariffs on energy imports from the U.S. On the New York Mercantile Exchange, light, sweet crude futures for delivery in July were down 1.8% at $63.88 a barrel in the Globex electronic session. August Brent crude on London’s ICE Futures exchange fell 0.8% to $72.84. Both had rebounded a bit from earlier lows. Energy-related products have been mentioned as China plans retaliatory tariffs against the U.S. That could mean that the world’s biggest importer of oil could eschew U.S. products at a time when exports of crude, coal and liquefied natural gas to Asia have been rising. Oil prices have also been pulled lower by reports Russia and Saudi Arabia are considering a plan to raise output by more than 1.5 million and 1 million barrels, respectively. […]