If he is found to be an illegal alien, then every law he signed while occupying the office is automatically invalid.
Wrong. See Ryder v U.S. (55 US 177).
This is from Devvy Kidd, a columnist for World News Daily and an author:
“If Obama dared to take the Presidential “Oath or Affirmation” of office, knowing that he was not “a natural born Citizen,” he would commit the crime of perjury or false swearing (see Article II, Section 1, Clause 7). So his purported “Oath or Affirmation” being perjured from the beginning, Obama’s every subsequent act in the usurped “Office of President” will be a criminal offense under Title 18, United States Code, Section 242.”
red