Lexington is a politically blue spot surrounded by a sea of red. It went with Democratic nominee Hillary Clinton in the 2016 president election by a 2-1 margin. As the burial site of Confederate Gens. Robert E. Lee and Thomas “Stonewall” Jackson, Lee-Jackson Day festivities stoke strong emotions and debate. “I believe this city is losing its identity,” said Simon Islam, a senior at Washington and Lee University, which is in Lexington. “It’s become too liberal, and it’s had a negative impact.” John Findlay, executive director of the Republican Party of Virginia, showed up with a roll of Trump 2020...