“As Republicans gather with President Donald Trump in Dallas this week in an effort to boost their sagging midterm elections prospects, their political challenges mounted with an ominous number flashing across financial terminals and news sites: $100,” the Washington Post reports.“Brent crude, the global benchmark for oil, crossed that threshold Wednesday amid fresh fighting in Iran, dimming the GOP’s hopes that the high gas prices driving voter frustration would ease before ballots are cast.”“The elevated oil price is certain to push up prices at the pump, which are already averaging more than $4 per gallon of regular gasoline nationwide, in this final stretch of the campaign.”