He is going to Hawaii to visit his grandmother who he hasn't seen for 16 months.

Obama is from Hawaii, remember? So him going there is not like you going to Hawaii, its like you going to your grandparents.

Obama looks tired to me.  I think he could use a break.  He got none between the primaries and general as most candidates do.

McCain can attack the vacation but it seems a really dumb idea for the following reasons:

•  I wouldn't go highlighting differences in work loads and energy levels if I were McCain.  Obama does an average of five events a day.  McCain does an average of one.  And McCain is going to lose a "whose more tired?" fight.
• McCain pretty much quit being a Senator years ago.  He hardly ever votes.  And not just during campaign season.  I do not believe has cast a single Senate vote in four months.  (If he has, its been a small handful).  He is routinely "unranked" in Senatorial rankings having not cast enough votes.  He has more than once been outvoted by Senators who died less than halfway thorugh sessions.
• Vacations, you say? Politicians?  Hmmm, any associations?  Yeah, bring up presidential vacations McCain.  Bush kinda fucked this issue up for you taking about 16 weeks of vacation a year.  Although to be fair to Bush, its not like there has been a lot of issues that desperately need presidential attention over the last eight years.
• And finally, McCain has a vacation scheduled in two weeks.