Survey of Democratic super-delegates: Marco Rubio is top 2016 threat
Bring on Donald Trump, and Ben Carson, too. That’s what Democratic insiders are saying about the Republican outsiders who sit solidly atop preference polls in the race for the GOP nomination for president. They are far more worried about GOP candidates who have experience in office, with Marco Rubio cited most often as the strongest potential competition for their overwhelming choice for the Democratic nomination, Hillary Rodham Clinton. “As a Democrat, I’d love to see a Trump-Carson ticket,” said Bob…