The latest battle in the Republican civil war is the campaign to get rid of one of the longest serving, most prominent conservatives in US politics. I'm here at the Ronald Reagan Day Diner at Kentucky's Russell County middle school to find out why some want to "Ditch Mitch" - Mitch McConnell, the Republican leader in the Senate. Amid the oval and rectangular tables, some draped with T-shirts and banners, a 16-year-old girl takes to the stage. As they tuck into the country buffet of chicken, ham, green beans and cornbread (no alcohol, this is a dry county) she intones:...