MADISON, Wis. (AP) — Video shot by a filmmaker captures Gov. Scott Walker explaining a "divide and conquer" strategy against unions to a top campaign donor.The video shows Beloit billionaire Diane Hendricks asking Walker in January 2011 whether he could make Wisconsin a "completely red state, and work on these unions, and become a right-to-work" state. Hendricks was referring to right-to-work laws which prevent private sector unions from making employees pay union dues if they choose not to join the union.Walker told Hendricks the "first step" would be "to divide and conquer" through his budget adjustment bill, which cut collective bargaining for most public employee unions.The Journal Sentinel (http://bit.ly/K7JCn7) says the documentary filmmaker, Brad Lichtenstein has worked for Democratic campaigns and has donated to Milwaukee Mayor Tom Barrett, Walker's opponent in the June 5 recall election.