FBI Director Kash Patel on Tuesday questioned why Sen. Chris Van Hollen would have “margaritas with a felon” and run up a $7,000 bar tab in Washington, DC — before daring the Maryland Democrat to take a test alongside him for alcohol dependency. “The only person that was slinging margaritas in El Salvador on the taxpayer dollar with a convicted, gang-banging rapist, was you,” Patel erupted in a Senate appropriations subcommittee hearing. Follow The Post’s live coverage of President Trump and national politics for the latest news and analysis Sen. Chris Van Hollen met with deported Salvadoran domestic abuser Kilmar Abrego Garcia. X/@nayibbukele “The only person that ran up $7,000 bar tab in Washington, DC, at the Lobby Bar was you,” he thundered.…