Sarah Longwell, a former Republican pollster who is now working to defeat former President Donald Trump, delivered some bad news when it comes to Trump’s running mate. Writing on Twitter, Longwell said that focus groups of undecided voters are not very high on Sen. J.D. Vance (R-OH), whom Trump tapped last week to be his vice-presidential nominee. “I’ve done a couple swing voter groups since the Vance VP announcement and these voters simply do not like him,” she said. “Both his flip flopping on Trump and his extreme abortion position are what breaks through.” Want more breaking political news?…