(1) the right to enter one state and leave another (an inherent right with historical support from the Articles of Confederation),
(2) the right to be treated as a welcome visitor rather than a hostile stranger (protected by the "Privileges and Immunities" clause in Article IV, § 2), and
(3) (for those who become permanent residents of a state) the right to be treated equally to native-born citizens (this is protected by the 14th Amendment'sPrivileges or Immunities Clause; citing the majority opinion in the Slaughter-House Cases, Justice Stevens said, "the Privileges or Immunities Clause of the Fourteenth Amendment . . . has always been common ground that this Clause protects the third component of the right to travel.")