I pledge Allegiance to the flag
of the United States of America
and to the Republic for which it stands,
one nation under God, indivisible,
with Liberty and Justice for all.

Historical note:

We are a Republic.  Not a pure Demoncracy as our schools often teach.  There is a big difference between the two as is demonstrated by the highlighted definitions in the following passages.

From Websters Dictionary:
de·moc·ra·cy (d -m k r -s ) n.  pl.de·moc·ra·cies
(

  1. Government by the people, exercised either directly or through elected representatives.
  2. A political or social unit that has such a government.
  3. The common people, considered as the primary source of political power.
  4. Majority rule.
  5. The principles of social equality and respect for the individual within a community.
re·pub·lic (r -p b l k) n.
    1. A political order whose head of state is not a monarch and in modern times is usually a president.
    2. A nation that has such a political order.
    1. A political order in which the supreme power lies in a body of citizens who are entitled to vote for officers and representatives responsible to them.
    2. A nation that has such a political order.
  1. often Republic A specific republican government of a nation: the Fourth Republic of France.
  2. An autonomous or partially autonomous political and territorial unit belonging to a sovereign federation.
  3. A group of people working as equals in the same sphere or field: the republic of letters.