I am old enough to remember that the most conservative President ever was a converted Democrat ... Yes, Ronaldus Maximus was a former Union boss from CA. I do not doubt that Tulsi could become a conservative, I just don’t think it has happened yet. If Trump wants her as his VP, he needs to put her on a speaking tour where she walks back her previous leftist speech.
Reagan was a former-Democrat who had established himself as a conservative after years of work. Gabbard has only done the first step. The second step takes time to establish credibility and not look like a rank opportunist.
If Trump named her VP and something happened to Trump in his second term so Gabbard succeeded him, in all likelihood, the WH would have been effectively surrendered to the progressive wing of the Democrat party. Gabbard's lifetime ACU rating is 7.6% which is barely above the members of the Squad. She backed Bernie Sanders. Her hatred of the Democrat establishment might have more to do with her progressive instincts than being an indicator that she is turning conservative. She sets of alarm bells with me.