Just to be clear: Putin and bio-"weapons" labs is different than Assad and sarin. I believe you are referring to the Russian spin that Ukraine was doing bioweapons research. (I also don't believe Tulsi espouses that slant, despite being initially concerned.)
> “Her response was, ‘How do you know it was Assad and Russia and not ISIS?’” Mustafa recalled of the exchange. “Ludicrous question: ISIS doesn’t have airplanes.” Henning, the spokeswoman for the Trump transition, denied the exchange occurred.
> Two years later, she echoed similar doubts about the Trump administration’s assessment that the Assad regime used sarin gas to attack civilians. A United Nations panel and numerous other foreign governments came to the same conclusion.
> “This war and suffering could have easily been avoided if Biden Admin/NATO had simply acknowledged Russia’s legitimate security concerns,” she posted on Twitter at the start of Russia’s invasion in 2022.
> Gabbard’s remarks about Russia haven’t gone unnoticed in Moscow, where state-run media have praised her and even jokingly referred to her as a Russian agent. An article published Friday in RIA Novosti, a major Russian state-controlled news agency, called Gabbard “superwoman” and noted her past appearances on Russian TV, claiming that Ukrainian intelligence views her as “probably an agent of the Russian special services.”