Golf is big in Iowa.
I don't think anyone in Iowa begrudges him vacation golf.
As an aside, I think vacations other than at Camp David should be at personal expense (including transportation costs), except for Secret Service coverage. If he/she pays for it, I don't care how many rounds of golf the presidents play while on vacation.
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"The true engine of economic growth will always be companies like Solyndra"...B.O.