Is it true in the 1968 election Hubert Humphrey claimed to have a secret plan to end the war?

Yes, during the 1968 presidential election, Hubert Humphrey, the Democratic candidate, claimed he had a "secret plan" to end the Vietnam War. However, he never detailed this plan, leading to skepticism and criticism from both opponents and some within his own party. His vague assurances contrasted with the growing anti-war sentiment among voters, ultimately impacting his campaign.