Donald Trump’s recent gaffe just undermined in entirety his lone campaign victory of the summer, a new political analysis contends. Trump, the former president and Republican presidential nominee, blundered with his defense of an “ugly and cynical” photo-op at Arlington National Cemetery, where he spurred outrage for a tone-deaf gravesite thumbs-up and possibly broke the law, according to The Nation D.C. bureau chief Chris Lehmann. “It’s entirely of a piece with Trump’s consistently derisive and dismissive view of soldiers and military service, and his determination to treat the military as a …