In 1942, after a few revisions, the following statement was added to the Flag Code by Congress: "I pledge allegiance to the Flag of the United States of America and to the Republic for which it stands, one nation indivisible, with liberty and justice for all."
In 1954, anti-communist sentiment enabled the Knights of Columbus to persuade Congress to further modify the statement, which now reads: "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."
In 2010, every one of my teaching mornings begins with an intercom call for "The Pledge of Allegiance," and 80-120 choir members (I don't think anyone ever refrains) recite it. This is what I hear: "I pledge allegiance (which is a big deal) to a symbol of a nation of which I am [most likely] a citizen by default, and to the form of government for which it stands, one nation (that's redundant) under something unknowable that we decided to claim as our own decades ago in political response to another nation's philosophies, indivisible (which is a stab at those guys who started the civil war that I'll pretend we didn't have), with liberty and justice for all (except for gays, women, minorities, the impoverished, atheists, and others).
To maintain a low profile, I keep my lips moving with these words (from this poem) by Langston Hughes:
Let America be America again.
Let it be the dream it used to be.
Let it be the pioneer on the plain
Seeking a home where he himself is free.