Frustrated Republican senators pushed back against Donald Trump after the former president encouraged killing a bipartisan border security deal. In remarks over the weekend, Trump suggested Republicans should vote down the bill because it was a “betrayal.” “It’s certainly not a betrayal, actually,” Sen. James Lankford (R-OK) told CNN’s Manu Raju. “We’ve got to be able to deal with issues in law. That’s how we actually deal with things in America.” Want more breaking political news? Click for the latest headlines at Raw Story. ALSO READ: ‘Abuse’: Politicians are fretting about AI stealing their…