What constitutional amendment did Harper v. Virginia State Board of Elections and Everson v. Board of Education apply
Harper v. Virginia State Board of Elections: Harper v. Virginia Board of Elections, 383 U.S. 663 (1966) , was a case in which the U.S. Supreme Court found that Virginia's poll tax was unconstitutional under the equal protection clause of the 14th Amendment. Everson v. Board of Education:  This was the first Supreme Court case incorporating the Establishment Clause of the First Amendment as binding upon the states through the Due Process Clause of the Fourteenth Amendment.
the Fourteenth Amendment