There are strict rules which cover the use of campaign funds. The honest candidates I know follow them to the letter of the law. Had he not shut the campaign and everything associated with it, the media would also have had a heyday with it. No way for honest people to win.
Remember the 10 felonies rule.
You create so many rules and laws that everyone commits 10 felonies per day....If they want you in jail, they easily have the grounds to arrest you.