Despite the undeniable evidence that there are Pentagon-linked biological labs in Ukraine, any concern about the pathogens has been labeled "Russian propaganda" by hawks in Washington. In response to Gabbard's video, Sen. Mitt Romney (R-UT) labeled her as "treasonous."

"Tulsi Gabbard is parroting false Russian propaganda. Her treasonous lies may well cost lives," Romney wrote on Twitter.

Gabbard's video also elicited a response from Rep. Adam Kinzinger (R-IL), one of the leading proponents of the idea that the US should impose a no-fly zone over Ukraine, which would mean direct conflict with Russia and risk nuclear war. "Actual Russian propaganda. Traitorous," Kinzinger said.

In response to Romney, Gabbard challenged Romney to provide evidence that what she said was not true. "Senator Romney, please provide evidence that what I said is untrue and treasonous. If you cannot, you should do the honorable thing: apologize and resign from the Senate," she said.

Gabbard also presented evidence of the US's involvement with Ukrainian biolabs, including a Pentagon fact sheet dated March 11 that details US funding of the facilities. The Pentagon funds labs in Ukraine through its Defense Threat Reduction Agency (DTRA). The fact sheet said since 2005, the US has "invested" $200 million in "supporting 46 Ukrainian laboratories, health facilities, and diagnostic sites."