Two reasons to not support McCain

John McCain voted against a federal Martin Luther King Jr. holiday in 1983.

McCain opposed an Arizona MLK state holiday in 1987.

McCain again opposed a federal MLK holiday in 1989.

In 1994 McCain voted against funding the commission established to encourage all states to recognize the King holiday.

Despite all this, as you'll see in the video, McCain claims to have voted against the MLK holiday 1983, but changed to support it "a very short time after that."

I'd say there are two reasons here to justify not supporting McCain. First, he was against the MLK holiday for a very long time. Second, he's lying about it.