Which U.S. President, despite never winning a statewide election prior to his presidency, oversaw the passage of landmark civil rights legislation and is associated with a specific 'Great' program?

1. He served in the House of Representatives, and as House Majority Leader, before becoming President.
2. His path to the White House involved a dramatic change in succession following a national tragedy.
3. He skillfully maneuvered to pass the Civil Rights Act of 1964.
4. His administration launched a series of social programs aimed at poverty alleviation.