Why did president johnson decide not to run for reelection in 1968?

Public opposition to the Vietnam War had made him unpopular.

President Johnson was a faithful adherent of the Vietnam War but as the opportunity for the polls in 1968 appeared the citizens started investigating the US engagement in the Vietnam War and was largely objected to it. President Johnson apprehended his beliefs turned him shunned and he understood he couldn't muster adequate support and thus did not contested for election again.

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although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.