He bought some shorts at a golf shop and tried to say they were golf balls for the wounded warriors? What the heck? In any large company you have to have an itemized receipt to submit an expense. And you would probably get fired for too many expense violations.
I wonder how pissed off his campaign donors are?
They probably don't care. It's likely that most of his donors are businesses and PACs (this is true of most in Congress).
As long as he votes the way they want him to vote, they don't care what he does with the money.
Most members of Congress, who, due to Gerrymandering, are stone cold locks to win every election, still get hundreds of thousands of dollars in campaign donations, even if they have no opponent (or maybe just a Libertarian Party opponent or a token major party opponent). Those donations are to get the member of Congress to vote a certain way, not to get him elected- they are guaranteed to be re-elected.