David Plouffe, President Barack Obama‘s 2008 campaign manager, says the lasting popularity of Republican presidential candidates Donald Trump and Ben Carson shows that “the old (political) rules don’t apply” anymore. Plouffe, now chief adviser to the Uber ride-hailing service, appeared on MSNBC’s “Morning Joe” program Wednesday. Trump, the real estate tycoon-turned-reality TV star, and Carson, a retired […]