WASHINGTON, Feb 12 (Reuters) - Here is the complete text of President Barack Obama's State of the Union speech, as prepared for delivery on Tuesday: Mr. Speaker, Mr. Vice President, Members of Congress, fellow citizens: Fifty-one years ago, John F. Kennedy declared to this Chamber that "the Constitution makes us not rivals for power but partners for progress ... It is my task," he said, "to report the State of the Union - to improve it is the task of us all."