This tweet from CBS’s Mark Knoller is getting some attention from the Left as evidence that President Bush is a bigger vacationer than President Obama:

@WoWSportsWoW Obama to date: 67 days vac & camp david. Bush(43) during same period: 216 ranch/kport/camp david 216 days.

But Knoller’s math is wrong. For President Bush, staying in his home in Crawford counts as a vacation day but for President Obama, staying in his home in D.C. and hitting the golf course for the afternoon counts as a work day.

President Obama can fly back and forth to Chicago every weekend for all I care. It’s his home and staying at one’s home does not make it a vacation day.