The story in the movie that caught my attention and that of the generally liberal audience involved the Democratic Senate primary of 1948. So intriguing was the primary that Caro thought it worthy of its own volume. This caused him to expand his projected three-volume series to five. In 1948, Johnson, then a congressman, was challenging popular three-term Texas Gov. Coke Stevenson for the Democratic nod – at the time, a guarantee of a general election victory. In the initial vote, Stevenson beat Johnson handily, but a third candidate drained off enough votes to mandate a run-off. As Democrats had...