You are totally wrong.
"[W]hile Roe v. Wade is invalid, a federal law banning abortion across all 50 states would be equally invalid." -- Ron Paul"[I]t (Roe) was a bad decision. I think that decision should rest in the hands of the states." -- John McCain
Rand Paul, Fred Thompson, and Sarah Palin all also hold this clearly unconstitutional position.
The United States Constitution:
"No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws."
By the way, Blackmun, the author of the infamous Roe majority opinion, said in the text of the decision that if the fetus is a person, they are “of course” protected by the Fourteenth Amendment.
In a real sense these pro-choice for states Republican politicians are worse than Blackmun. They admit that the child is a person, and then say that the states have a “right” to allow their brutal destruction.