The Texas congressman who was the 43rd speaker of the US House of Representatives was Sam Rayburn.
<h3>Who is Sam Rayburn?</h3>
He was an American politician.
He served as the 43rd Speaker of the House of Representatives.
Furthermore, he was the longest serve member.
In 1961, Rayburn's successful push to enlarge the membership of the powerful House Rules Committee.
He died in Bonham, Texas, on November 16, 1961.
Thus, the correct option is B.
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