Justice Thomas has repeatedly stated that abortion should be a state issue. He would undoubtedly vote to repeal the federal "right" to abortion if presented with another test case. If abortion is murder, which I believe it is, then how should it not be considered a state issue? The constitution gives states he authority to regulate crimes like murder? The federal government has the constitutional authority to prosecute three crimes: piracy, counterfeiting, and treason. A federal law banning abortion would violate the Constitution. It would have to be a constitutional amendment (a Human Life Amendment), and I'd support a constitutional amendment that would force states to outlaw the practice with certain exceptions. You need 38 states, however.
"No person shall be deprived of life without due process of law.""No State shall deprive any person of life without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws."
"The appellee and certain amici argue that the fetus is a 'person' within the language and meaning of the Fourteenth Amendment. In support of this, they outline at length and in detail the well known facts of fetal development. If this suggestion of personhood is established, the appellant's case, of course, collapses, for the fetus' right to life would then be guaranteed specifically by the Amendment."-- Justice Harry A. Blackmun, Roe vs. Wade, 1973
I think we would have more luck in presenting our case against Roe v. Wade as a improper Judicial decision which violated the 5th Amendment (no deprivation of life w/o due process of law) and the 10th Amendment (Fed barred from things not specifically stated in the Constitution).