The U.S. Chamber of Commerce is under fire from some local chambers over its hard-hitting $75 million ad campaign to elect a Republican House, with dozens of groups distancing themselves from the effort and a handful even quitting the national group in protest.

“We were getting pounded. We felt here, in central Pennsylvania, that the ads they were running were not professional ads,” said David Wise, president of the Chamber of Business and Industry of Centre County, which is considering dropping its national membership. “This was not a unifying event. It was divisive.”

More than 40 local chambers issued statements during the midterms distancing themselves from the U.S. Chamber’s campaign — including nearly every major local chamber in Iowa and New Hampshire, key states for the presidential campaign.

Other chambers plan to take the extraordinary step of ending their affiliation with the U.S. Chamber, including the Greater Philadelphia Chamber of Commerce in Pennsylvania. Its leaders reported being inundated with angry — and sometimes profanity-laced — telephone calls from people objecting to the U.S. Chamber-backed ads.