In 1968, Richard Nixon was elected with 42% of the popular vote in a very divisive presidential election.
In 1972, President Nixon enjoyed one of the greatest landslides of all time. He got 61% of the popular vote beating Senator McGovern by 18 million votes.
McGovern was a critic of the war. However, President Nixon withdrew most of the troops and the war not the issue that the Democrats expected. Also, Senator McGovern was branded as a liberal and flopped in most of the country.