Complex sentence: In 1963 he won the 1963 election as the candidate of the newly created Democratic Republican Party narrowly former President Yun, the candidate of the Civil Rule Party, by just over 156,000 votes--a margin of 1.5 percent.
Split into simpler sentences: In 1963 he won the 1963 election as the candidate of the newly created Democratic Republican Party. Narrowly defeating former President Yun, the candidate of the Civil Rule Party, by just over 156,000 votes--a margin of 1.5 percent.