Commentary: How Nixon’s legacy is protecting Trump

FILE - In this Sept. 29, 2006 file photo, Fox News CEO Roger Ailes poses at Fox News in New York. A new documentary, “Divide and Conquer: The Roger Ailes Story,” directed by Alexis Bloom, deconstructs the rise and fall of the late head of Fox News Channel. The film opens in theaters on Dec. 6, as well as VOD, Apple iTunes, and Amazon streaming services. (AP Photo/Jim Cooper, File) Deep down in a cache of documents at the Richard Nixon Presidential Library and Museum sits a 15-page memorandum entitled "A Plan For Putting The GOP On TV News."

The memo, dug up by journalist John Cook in 2011, was written two years before Nixon’s 49-state landslide re-election in 1972. Even five decades ago,…