Jimmy Kimmel posts a doctored image inserting his face into a hospital photograph of Senator Mitch McConnell and captions it, “For those who’ve been asking, I’m feeling great.”Mitch McConnell shared the original hospital photo with his wife, Elaine Chao, to reassure constituents after a fall and a brief hospitalization in which he says he suffered no major injuries and received treatment for mild pneumonia.The exchange, and Mr. Kimmel’s decision to interrupt his vacation to mock a “proof of life” image, renews debate about manipulated images, hospital privacy and how public figures demonstrate fitness for office.