What The Hell Is Wrong With John McCain?

So we aren't even in the same year as the next Presidential election, yet John McCain skips the Senate vote on the funding for Iraq because he is on a "presidential campaign swing." This is April 2007, Not April 2008 or even October 2008. This is from The Hill:

The Senate voted, 51-46, to OK the conference report’s goal of withdrawing most U.S. troops from Iraq by April 2008. Sen. John McCain (R-Ariz.) missed the vote while on a presidential campaign swing, and Sens. Lindsey Graham (R-S.C.) and Tim Johnson (D-S.D.) were also absent.