A former supporter of Donald Trump left the fold because he grew tired of being a “dog” the far-right media had trained to bark at the behest of a “sociopath” like the former president, the swing state voter wrote in a new editorial Tuesday. Tom Keltner, of Ohio, details for the Cincinnati Enquirer his shift from election-denier to never-Trumper, spurred by a desire to escape conservative media’s hold and a PBS documentary about the Capitol riots on Jan. 6, 2021. “After watching it, I felt embarrassed that I have been influenced to ignore outside information from ‘my bubble’ and felt like a do…