WASHINGTON (Reuters) – The U.S. oil and gas industry is lobbying against tighter sanctions on Russia that could impact U.S. investments there, congressional sources said on Friday. The U.S. Senate has revived a bill, called DETER, that would allow for swift sanctions if Moscow was found meddling in future U.S. elections. Both Democrats and Republicans are looking to redress what they consider President Donald Trump’s weak stance on accusations of Russian interference in the 2016 election when he met Russian President Vladimir Putin on Monday. Top U.S. energy company Exxon Mobil is among the firms that have previously opposed U.S. sanctions on Russia. Opponents claim sanctions unfairly penalize U.S. companies while allowing foreign energy rivals such as Royal Dutch Shell and BP to operate […]