U.S. Senator John McCain arrived in Seoul on Sunday.
The 2008 presidential candidate for the Republican Party plans to meet with representatives of North Korean defectors' groups and visit a U.S. Army base during his visit.
The Vietnam War veteran is known for his hardline stance on North Korea. During the 2008 presidential campaign, McCain insisted that there should be no unconditional negotiations with then-North Korean leader Kim Jong-il, whom he called a dictator.