He already was... remember? President John F. Kennedy (deceased) reinstated him in Dallas, TX on 11 August and installed his son (deceased) as Insurrectionist-Cry-Baby-trump's Vice President.
@BohemianBabe I'm not sure, even as crazed as RFK, Jr. has become, he would have signed on as VP if only to protect his father's and family's legacy. But, he did reach out to the campaign and reportedly had a discussion with Insurrectionist-Cry-Baby-trump directly who promised him "some" position in a fantasy administration in a transaction exchange for his public support. In the end though, it was RFK, Jr. who turned it down.