Shale-focused U.S. oil producers could generate $63.4 billion in extra cash flow if the U.S. benchmark crude price averages $100 per barrel this year, intelligence firm Rystad Energy says. Following the oil price spike to $100 per barrel last week amid the escalating war in the Middle East, U.S. President Donald Trump touted the benefits for the producers, now that his campaign pledge to slash energy costs for consumers by 50% is not mentioned in the White House’s PR campaign to contain the fallout from the war on the American consumer. U.S.…