This space spends a lot of time worrying over and updating the latest campaign commercials. The rest of you in the junkie class should probably bookmark the Washington Post's presidential commercial tracker immediately, if you haven't already.
The site tracks both cumulative and weekly (above) spending totals on the race by campaigns and SuperPACs and allows breakouts by market. Why was there $306K in Pittsburgh spending last week but only $15K in Philly? Cleveland had a whopping $861K in spending, second in the nation only to the $880K in Charlotte.