Respuesta :

On October 31st, 1968, President Johnson announced bombing halt in order to help Hubert Humphrey's campaign.

Answer:

His decision to halt the bombing of North Vietnam, is the right answer.

Explanation:

The presidential campaign of 1968 by Hubert Humphrey started when Hubert Humphrey, the then U.S. Vice-President determined to solicit the Democratic Party appointment for the U.S. President following the proclamation by Lyndon B. Johnson, the then U.S. President, that he would not ask for the nomination of the party.