CiG
Approximately Infinite Universe
Not that odd when you consider she's widely demonized on all non-FOX cable media as a Russian plant or as gunning for a FOX contributor job. He and others had multiple chances to defend her in the early debates, and everyone basically ignored her (except when the HRC accusation came up and Mayor Butt gave a generic "I'm a fellow soldier and I'm proud to serve Murrica and I'm proud of Tulsi's service to the country" defense).
This also: https://edition.cnn.com/2019/10/21/politics/bernie-sanders-tulsi-gabbard-tweet/index.html