But, like the smooth guy you are, you scored the highest percentage of the vote of any Democrat since Lyndon Johnson

from Michael Moore – An Open Letter To President Obama on Rap Genius

Meaning

Lyndon B. Johnson was the 36th President of the United States, and a democrat.

served as a United States Representative from 1937–1949 and as a Senator from 1949–1961, including six years as United States Senate Majority Leader, two as Senate Minority Leader and two as Senate Majority Whip. After campaigning unsuccessfully for the Democratic nomination in 1960, Johnson was asked by John F. Kennedy to be his running mate for the 1960 presidential election.

More importantly in context with the line Lyndon’s election is still today an astounding figure

It was the sixth-most lopsided presidential election in the history of the United States in terms of electoral votes; in terms of popular vote, it was the fifth-most.

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